Odd build failure with new-build

[edsko]

Building https://github.com/well-typed/ghc-events-analyze with ghc 7.8.4:

[7.8.4 ~/wt/util/ghc-events-analyze]
# cabal new-build
In order, the following will be built (use -v for more details):
 - JuicyPixels-3.2.8 (lib) (requires build)
 - attoparsec-0.13.1.0 (lib) (requires build)
 - bytes-0.15.2 (lib:bytes) (requires build)
 - comonad-5 (lib:comonad) (requires build)
 - bifunctors-5.4.1 (lib) (requires build)
 - semigroupoids-5.1 (lib:semigroupoids) (requires build)
 - profunctors-5.2 (lib) (requires build)
 - monoid-extras-0.4.2 (lib) (requires build)
 - free-4.12.4 (lib) (requires build)
 - dual-tree-0.2.0.9 (lib) (requires build)
 - adjunctions-4.3 (lib:adjunctions) (requires build)
 - kan-extensions-5.0.1 (lib:kan-extensions) (requires build)
 - lens-4.13.2.1 (lib:lens) (requires build)
 - linear-1.20.5 (lib:linear) (requires build)
 - diagrams-core-1.3.0.8 (lib) (requires build)
 - active-0.2.0.11 (lib) (requires build)
 - diagrams-lib-1.3.1.4 (lib) (requires build)
 - diagrams-svg-1.3.1.10 (lib) (requires build)
 - SVGFonts-1.5.0.1 (lib) (requires build)
 - ghc-events-analyze-0.2.4 (exe:ghc-events-analyze) (first run)
Configuring JuicyPixels-3.2.8 (lib)...
Configuring bytes-0.15.2 (all, due to Custom setup)...
Configuring comonad-5 (all, due to Custom setup)...
Configuring attoparsec-0.13.1.0 (lib)...
Building JuicyPixels-3.2.8 (lib)...
Building attoparsec-0.13.1.0 (lib)...
Building bytes-0.15.2 (all, due to Custom setup)...
Building comonad-5 (all, due to Custom setup)...

Failed to build comonad-5.
Build log (
/home/edsko/.cabal/logs/ghc-7.8.4/comonad-5-437279585ea9744112b077582af427a268914ddd2c2431293f5074d4d6cd3241.log
):
[1 of 1] Compiling Main             ( /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/comonad-27362/comonad-5/dist/setup/setup.hs, /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/comonad-27362/comonad-5/dist/setup/Main.o )
Linking /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/comonad-27362/comonad-5/dist/setup/setup ...
Configuring comonad-5...
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package comonad-5 requires semigroups-0.18.2
package void-0.7.1 requires semigroups-0.18.2
package contravariant-1.4 requires semigroups-0.18.2
package semigroups-0.18.2 requires tagged-0.8.5
package distributive-0.5.0.2 requires tagged-0.8.5
package comonad-5 requires tagged-0.8.5
package semigroups-0.18.2 requires tagged-0.8.5
package transformers-compat-0.5.1.3 requires transformers-0.3.0.0
package tagged-0.8.5 requires transformers-0.3.0.0
package semigroups-0.18.2 requires transformers-0.3.0.0
package mtl-2.1.3.1 requires transformers-0.3.0.0
package transformers-compat-0.5.1.4 requires transformers-0.4.3.0
package tagged-0.8.5 requires transformers-0.4.3.0
package semigroups-0.18.2 requires transformers-0.4.3.0
package distributive-0.5.0.2 requires transformers-0.4.3.0
package contravariant-1.4 requires transformers-0.4.3.0
package comonad-5 requires transformers-0.4.3.0
package StateVar-1.1.0.4 requires transformers-0.4.3.0
package tagged-0.8.5 requires transformers-compat-0.5.1.3
package tagged-0.8.5 requires transformers-compat-0.5.1.4
package distributive-0.5.0.2 requires transformers-compat-0.5.1.4
package contravariant-1.4 requires transformers-compat-0.5.1.4
package comonad-5 requires transformers-compat-0.5.1.4
Building comonad-5...
Preprocessing library comonad-5...
<command line>: cannot satisfy -package-id contravariant-1.4-bae32c9e724adad6675401bbe99f77a7c50e32590f5498a39e9d84bad244752e: 
    contravariant-1.4-bae32c9e724adad6675401bbe99f77a7c50e32590f5498a39e9d84bad244752e is unusable due to missing or recursive dependencies:
      semigroups-0.18.2-4b5cec38e54f3f8c5f706b7a5de7d62d76d6e066b093855c4ba8d3790127adbf void-0.7.1-63f1539a3daefec962d731e1899ce5d9e3cb0f07e61d347dc264de4d5495b5c9
    (use -v for more information)
cabal: Failed to build comonad-5 (which is required by ghc-events-analyze).
See the build log above for details.

Blowing away my ~/.cabal/store/7.8.4 directory solved the problem. I realize that this bug report doesn't give much to go on... But wanted to report it anyway. Feel free to close as "not enough information" :)

[ezyang]

Well, next time, give us some verbose logs ;)

[edsko]

Fair enough 😳

[edsko]

Hmmmm.. So this is after I blew away my store. A bit later, fiddling with the dependencies of my project, another build failure:

cabal new-build
In order, the following will be built (use -v for more details):
 - bytes-0.15.2 (lib:bytes) (requires build)
 - distributive-0.5.0.2 (lib:distributive) (requires build)
 - intervals-0.7.2 (lib:intervals) (requires build)
 - comonad-5 (lib:comonad) (requires build)
 - bifunctors-5.4.1 (lib) (requires build)
 - semigroupoids-5.1 (lib:semigroupoids) (requires build)
 - profunctors-5.2 (lib) (requires build)
 - monoid-extras-0.4.2 (lib) (requires build)
 - free-4.12.4 (lib) (requires build)
 - dual-tree-0.2.0.9 (lib) (requires build)
 - adjunctions-4.3 (lib:adjunctions) (requires build)
 - kan-extensions-5.0.1 (lib:kan-extensions) (requires build)
 - lens-4.14 (lib:lens) (requires build)
 - linear-1.20.5 (lib:linear) (requires build)
 - diagrams-core-1.3.0.8 (lib) (requires build)
 - active-0.2.0.11 (lib) (requires build)
 - diagrams-lib-1.3.1.4 (lib) (requires build)
 - diagrams-svg-1.4.0.4 (lib) (requires build)
 - SVGFonts-1.6.0.0 (lib) (requires build)
 - ghc-events-analyze-0.2.4 (exe:ghc-events-analyze) (configuration changed)
Configuring bytes-0.15.2 (all, due to Custom setup)...
Configuring distributive-0.5.0.2 (all, due to Custom setup)...
Building bytes-0.15.2 (all, due to Custom setup)...
Building distributive-0.5.0.2 (all, due to Custom setup)...

Failed to build bytes-0.15.2.
Build log (
/home/edsko/.cabal/logs/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa.log
):
[1 of 1] Compiling Main             ( /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19468/bytes-0.15.2/dist/setup/setup.hs, /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19468/bytes-0.15.2/dist/setup/Main.o )
Linking /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19468/bytes-0.15.2/dist/setup/setup ...
Configuring bytes-0.15.2...
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package transformers-compat-0.5.1.4 requires transformers-0.4.3.0
package tagged-0.8.5 requires transformers-0.4.3.0
package semigroups-0.18.2 requires transformers-0.4.3.0
package transformers-compat-0.5.1.4 requires transformers-0.5.2.0
package primitive-0.6.1.0 requires transformers-0.5.2.0
package mtl-2.2.1 requires transformers-0.5.2.0
package bytes-0.15.2 requires transformers-0.5.2.0
package bytes-0.15.2 requires transformers-compat-0.5.1.4
package tagged-0.8.5 requires transformers-compat-0.5.1.4
Building bytes-0.15.2...
Preprocessing library bytes-0.15.2...
<command line>: cannot satisfy -package-id transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0: 
    transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0 is shadowed by package transformers-compat-0.5.1.4-83b3d6616fe75d67e1e3fe3c937fd6caec1b4d1ab6d093d2964112fca1695d20
    (use -v for more information)

Failed to build distributive-0.5.0.2.
Build log (
/home/edsko/.cabal/logs/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194.log
):
[1 of 1] Compiling Main             ( /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19468/distributive-0.5.0.2/dist/setup/setup.hs, /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19468/distributive-0.5.0.2/dist/setup/Main.o )
Linking /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19468/distributive-0.5.0.2/dist/setup/setup ...
Configuring distributive-0.5.0.2...
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package transformers-compat-0.5.1.4 requires transformers-0.4.3.0
package tagged-0.8.5 requires transformers-0.4.3.0
package transformers-compat-0.5.1.4 requires transformers-0.5.2.0
package distributive-0.5.0.2 requires transformers-0.5.2.0
package distributive-0.5.0.2 requires transformers-compat-0.5.1.4
package tagged-0.8.5 requires transformers-compat-0.5.1.4
Building distributive-0.5.0.2...
Preprocessing library distributive-0.5.0.2...
<command line>: cannot satisfy -package-id transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0: 
    transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0 is shadowed by package transformers-compat-0.5.1.4-83b3d6616fe75d67e1e3fe3c937fd6caec1b4d1ab6d093d2964112fca1695d20
    (use -v for more information)
cabal: Failed to build bytes-0.15.2 (which is required by ghc-events-analyze).
See the build log above for details.
Failed to build distributive-0.5.0.2 (which is required by
ghc-events-analyze). See the build log above for details.

Verbose log:

cabal new-build -v2
Number of threads used: 4.
In order, the following will be built:
 - bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa (lib:bytes) (requires build)
 - distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194 (lib:distributive) (requires build)
 - intervals-0.7.2-1617adba4b929013f0f4603f686d13458372a13b65011dfe3620840ba2ef7ee6 (lib:intervals) (requires build)
 - comonad-5-04fb0b22ed9e52cc6e632527101946305fa717b5fc10e5aea0fedd7a3cb20ce5 (lib:comonad) (requires build)
 - bifunctors-5.4.1-21cafe13756b29cd866973236c148142bd3c78e6701e8bd39b922ae6e5a0f938 (lib) (requires build)
 - semigroupoids-5.1-5bff6071ef471d593916f36d6a6c66a9be9773212b48e4cdf7a4ec0571039435 (lib:semigroupoids) (requires build)
 - profunctors-5.2-31753e54cd983eef682104d9f902c3844b360c73cc460487cddeb14455e07075 (lib) (requires build)
 - monoid-extras-0.4.2-fb94e458bf4d3e7042e09a44810fea1f3d07edd5260ca8b4f333c13e766aa9df (lib) (requires build)
 - free-4.12.4-fb00e4d8323461b0b85e48cd26702fc8d86fbdcd33c51bfc08f7a3ed504257e5 (lib) (requires build)
 - dual-tree-0.2.0.9-d87926c8ddee98811c071b29449b53ab3eb92ff04f8cf7bcfcedecc35e916e28 (lib) (requires build)
 - adjunctions-4.3-92d2b16962ee23dfb802f6ef130b967146548762bb0ab42bfb63e190251e3cbd (lib:adjunctions) (requires build)
 - kan-extensions-5.0.1-b80048275cd60b2a436f7de065cc1a0aed10708feab3a6abf97a20d76643a80d (lib:kan-extensions) (requires build)
 - lens-4.14-2e5354413a54eac4cd870de64835a2f8f4b09953462be1d383dc15bb8ed68260 (lib:lens) (requires build)
 - linear-1.20.5-b23d721fb912de13bb65e75273afb0b72e641960cdc6ff1783dac918c14492fc (lib:linear) (requires build)
 - diagrams-core-1.3.0.8-04dc107c592bb516c3fa2e20bd83fbd5f44dc55779ec1b00e5cdbcc81a036003 (lib) (requires build)
 - active-0.2.0.11-e1044d1978ddb58c8fe9c2304df8f9ae652745d9e4a49a8337c295541d2e662b (lib) (requires build)
 - diagrams-lib-1.3.1.4-b57bbc110217b84be0ba0b1b137a2ff6f1cf0be853a0b0e6570b313ff04213b8 (lib) (requires build)
 - diagrams-svg-1.4.0.4-1f7e472c71c934ed6301c5225dc8912e445139cac93ed2a7cefb4ca1133f0b15 (lib) (requires build)
 - SVGFonts-1.6.0.0-ccc8ba7b93a1f534ff3ae89c7b96ec120930dd49fa3a1433553c8329d6407081 (lib) (requires build)
 - ghc-events-analyze-0.2.4-inplace-ghc-events-analyze (exe:ghc-events-analyze) (configuration changed)
creating /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/build
creating /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp
Extracting
/home/edsko/.cabal/packages/hackage.haskell.org/bytes/0.15.2/bytes-0.15.2.tar.gz
to /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759...
Extracting
/home/edsko/.cabal/packages/hackage.haskell.org/distributive/0.5.0.2/distributive-0.5.0.2.tar.gz
to
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759...
Updating distributive.cabal with the latest revision from the index.
Updating bytes.cabal with the latest revision from the index.
creating dist
Configuring bytes-0.15.2 (all, due to Custom setup)...
creating
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup
creating
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist
creating
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup
creating dist
Configuring distributive-0.5.0.2 (all, due to Custom setup)...
creating
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup
creating
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist
creating
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup
/opt/ghc/7.8.4/bin/ghc --make -fbuilding-cabal-package -odir /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup -hidir /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup -i -i/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2 -hide-all-packages -no-user-package-db -package-db /home/edsko/.cabal/store/ghc-7.8.4/package.db -package-id Cabal-1.18.1.5-6478013104bde01737bfd67d34bbee0a -package-id array-0.5.0.0-470385a50d2b78598af85cfe9d988e1b -package-id base-4.7.0.2-bfd89587617e381ae01b8dd7b6c7f1c1 -package-id binary-0.7.1.0-f867dbbb69966feb9f5c4ef7695a70a5 -package-id bytestring-0.10.4.0-d6f1d17d717e8652498cab8269a0acd5 -package-id containers-0.5.5.1-d4bd887fb97aa3a46cbadc13709b7653 -package-id deepseq-1.3.0.2-63a1ab91b7017a28bb5d04cb1b5d2d02 -package-id directory-1.2.1.0-07cd1f59e3c6cac5e3e180019c59a115 -package-id filepath-1.3.0.2-25a474a9272ae6260626ce0d70ad1cab -package-id ghc-prim-0.3.1.0-a24f9c14c632d75b683d0f93283aea37 -package-id old-time-1.1.0.2-e3f776e97c1a6ff1770b04943a7ef7c6 -package-id pretty-1.1.1.1-0984f47ffe93ef3983c80b96280f1c3a -package-id process-1.2.0.0-06c3215a79834ce4886ae686a0f81122 -package-id template-haskell-2.9.0.0-6d27c2b362b15abb1822f2f34b9ae7f9 -package-id time-1.4.2-9b3076800c33f8382c38628f35717951 -package-id transformers-0.5.2.0-8f4053c5ed06a19e4e5e0e81d25f840e66b9385aee3a3f2de9244c80fca94334 -package-id unix-2.7.0.1-f8658ba9ec1c4fba8a371a8e0f42ec6c /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/setup.hs -o /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/setup -threaded
/opt/ghc/7.8.4/bin/ghc --make -fbuilding-cabal-package -odir /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup -hidir /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup -i -i/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2 -hide-all-packages -no-user-package-db -package-db /home/edsko/.cabal/store/ghc-7.8.4/package.db -package-id Cabal-1.18.1.5-6478013104bde01737bfd67d34bbee0a -package-id array-0.5.0.0-470385a50d2b78598af85cfe9d988e1b -package-id base-4.7.0.2-bfd89587617e381ae01b8dd7b6c7f1c1 -package-id binary-0.7.1.0-f867dbbb69966feb9f5c4ef7695a70a5 -package-id bytestring-0.10.4.0-d6f1d17d717e8652498cab8269a0acd5 -package-id containers-0.5.5.1-d4bd887fb97aa3a46cbadc13709b7653 -package-id deepseq-1.3.0.2-63a1ab91b7017a28bb5d04cb1b5d2d02 -package-id directory-1.2.1.0-07cd1f59e3c6cac5e3e180019c59a115 -package-id filepath-1.3.0.2-25a474a9272ae6260626ce0d70ad1cab -package-id ghc-prim-0.3.1.0-a24f9c14c632d75b683d0f93283aea37 -package-id old-time-1.1.0.2-e3f776e97c1a6ff1770b04943a7ef7c6 -package-id pretty-1.1.1.1-0984f47ffe93ef3983c80b96280f1c3a -package-id process-1.2.0.0-06c3215a79834ce4886ae686a0f81122 -package-id template-haskell-2.9.0.0-6d27c2b362b15abb1822f2f34b9ae7f9 -package-id time-1.4.2-9b3076800c33f8382c38628f35717951 -package-id transformers-0.5.2.0-8f4053c5ed06a19e4e5e0e81d25f840e66b9385aee3a3f2de9244c80fca94334 -package-id unix-2.7.0.1-f8658ba9ec1c4fba8a371a8e0f42ec6c /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/setup.hs -o /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/setup -threaded
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/setup
configure --verbose=2 --builddir=dist --ghc
--prefix=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194
--bindir=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/bin
--libdir=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/lib
--libsubdir=
--libexecdir=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/libexec
--datadir=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/share
--datasubdir=
--docdir=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/share/doc
--htmldir=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/share/doc/html
--haddockdir=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/share/doc/html
--sysconfdir=/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/etc
--enable-library-vanilla --disable-library-profiling --enable-shared
--disable-executable-dynamic --disable-executable-profiling
--enable-optimization --disable-library-for-ghci --disable-split-objs
--disable-executable-stripping --package-db=clear --package-db=global
--package-db=/home/edsko/.cabal/store/ghc-7.8.4/package.db --flags=tagged
--constraint=base ==4.7.0.2 --constraint=base-orphans ==0.5.4
--constraint=tagged ==0.8.5 --constraint=transformers ==0.5.2.0
--constraint=transformers-compat ==0.5.1.4 --disable-tests
--disable-library-coverage --disable-benchmarks
--with-ghc=/opt/ghc/7.8.4/bin/ghc --with-ghc-pkg=/opt/ghc/7.8.4/bin/ghc-pkg
Redirecting build log to {handle:
/home/edsko/.cabal/logs/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194.log}
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/setup
configure --verbose=2 --builddir=dist --ghc
--prefix=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa
--bindir=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/bin
--libdir=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/lib
--libsubdir=
--libexecdir=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/libexec
--datadir=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/share
--datasubdir=
--docdir=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/share/doc
--htmldir=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/share/doc/html
--haddockdir=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/share/doc/html
--sysconfdir=/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/etc
--enable-library-vanilla --disable-library-profiling --enable-shared
--disable-executable-dynamic --disable-executable-profiling
--enable-optimization --disable-library-for-ghci --disable-split-objs
--disable-executable-stripping --package-db=clear --package-db=global
--package-db=/home/edsko/.cabal/store/ghc-7.8.4/package.db
--flags=test-doctests --constraint=base ==4.7.0.2 --constraint=binary
==0.7.1.0 --constraint=bytestring ==0.10.4.0 --constraint=cereal ==0.5.3.0
--constraint=containers ==0.5.5.1 --constraint=hashable ==1.2.4.0
--constraint=mtl ==2.2.1 --constraint=scientific ==0.3.4.9 --constraint=text
==1.2.2.1 --constraint=time ==1.4.2 --constraint=transformers ==0.5.2.0
--constraint=transformers-compat ==0.5.1.4 --constraint=unordered-containers
==0.2.7.1 --constraint=void ==0.7.1 --disable-tests --disable-library-coverage
--disable-benchmarks --with-ghc=/opt/ghc/7.8.4/bin/ghc
--with-ghc-pkg=/opt/ghc/7.8.4/bin/ghc-pkg
Redirecting build log to {handle:
/home/edsko/.cabal/logs/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa.log}
Building distributive-0.5.0.2 (all, due to Custom setup)...
creating
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup
Building bytes-0.15.2 (all, due to Custom setup)...
creating
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup
/opt/ghc/7.8.4/bin/ghc --make -fbuilding-cabal-package -odir /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup -hidir /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup -i -i/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2 -hide-all-packages -no-user-package-db -package-db /home/edsko/.cabal/store/ghc-7.8.4/package.db -package-id Cabal-1.18.1.5-6478013104bde01737bfd67d34bbee0a -package-id array-0.5.0.0-470385a50d2b78598af85cfe9d988e1b -package-id base-4.7.0.2-bfd89587617e381ae01b8dd7b6c7f1c1 -package-id binary-0.7.1.0-f867dbbb69966feb9f5c4ef7695a70a5 -package-id bytestring-0.10.4.0-d6f1d17d717e8652498cab8269a0acd5 -package-id containers-0.5.5.1-d4bd887fb97aa3a46cbadc13709b7653 -package-id deepseq-1.3.0.2-63a1ab91b7017a28bb5d04cb1b5d2d02 -package-id directory-1.2.1.0-07cd1f59e3c6cac5e3e180019c59a115 -package-id filepath-1.3.0.2-25a474a9272ae6260626ce0d70ad1cab -package-id ghc-prim-0.3.1.0-a24f9c14c632d75b683d0f93283aea37 -package-id old-time-1.1.0.2-e3f776e97c1a6ff1770b04943a7ef7c6 -package-id pretty-1.1.1.1-0984f47ffe93ef3983c80b96280f1c3a -package-id process-1.2.0.0-06c3215a79834ce4886ae686a0f81122 -package-id template-haskell-2.9.0.0-6d27c2b362b15abb1822f2f34b9ae7f9 -package-id time-1.4.2-9b3076800c33f8382c38628f35717951 -package-id transformers-0.5.2.0-8f4053c5ed06a19e4e5e0e81d25f840e66b9385aee3a3f2de9244c80fca94334 -package-id unix-2.7.0.1-f8658ba9ec1c4fba8a371a8e0f42ec6c /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/setup.hs -o /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/setup -threaded
/opt/ghc/7.8.4/bin/ghc --make -fbuilding-cabal-package -odir /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup -hidir /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup -i -i/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2 -hide-all-packages -no-user-package-db -package-db /home/edsko/.cabal/store/ghc-7.8.4/package.db -package-id Cabal-1.18.1.5-6478013104bde01737bfd67d34bbee0a -package-id array-0.5.0.0-470385a50d2b78598af85cfe9d988e1b -package-id base-4.7.0.2-bfd89587617e381ae01b8dd7b6c7f1c1 -package-id binary-0.7.1.0-f867dbbb69966feb9f5c4ef7695a70a5 -package-id bytestring-0.10.4.0-d6f1d17d717e8652498cab8269a0acd5 -package-id containers-0.5.5.1-d4bd887fb97aa3a46cbadc13709b7653 -package-id deepseq-1.3.0.2-63a1ab91b7017a28bb5d04cb1b5d2d02 -package-id directory-1.2.1.0-07cd1f59e3c6cac5e3e180019c59a115 -package-id filepath-1.3.0.2-25a474a9272ae6260626ce0d70ad1cab -package-id ghc-prim-0.3.1.0-a24f9c14c632d75b683d0f93283aea37 -package-id old-time-1.1.0.2-e3f776e97c1a6ff1770b04943a7ef7c6 -package-id pretty-1.1.1.1-0984f47ffe93ef3983c80b96280f1c3a -package-id process-1.2.0.0-06c3215a79834ce4886ae686a0f81122 -package-id template-haskell-2.9.0.0-6d27c2b362b15abb1822f2f34b9ae7f9 -package-id time-1.4.2-9b3076800c33f8382c38628f35717951 -package-id transformers-0.5.2.0-8f4053c5ed06a19e4e5e0e81d25f840e66b9385aee3a3f2de9244c80fca94334 -package-id unix-2.7.0.1-f8658ba9ec1c4fba8a371a8e0f42ec6c /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/setup.hs -o /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/setup -threaded
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/setup
build --verbose=2 --builddir=dist
Redirecting build log to {handle:
/home/edsko/.cabal/logs/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194.log}
/home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/setup
build --verbose=2 --builddir=dist
Redirecting build log to {handle:
/home/edsko/.cabal/logs/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa.log}

Failed to build bytes-0.15.2.
Build log (
/home/edsko/.cabal/logs/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa.log
):
[1 of 1] Compiling Main             ( /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/setup.hs, /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/Main.o )
Linking /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/bytes-19759/bytes-0.15.2/dist/setup/setup ...
Configuring bytes-0.15.2...
Flags chosen: test-doctests=True
Dependency base ==4.7.0.2: using base-4.7.0.2
Dependency binary ==0.7.1.0: using binary-0.7.1.0
Dependency bytestring ==0.10.4.0: using bytestring-0.10.4.0
Dependency cereal ==0.5.3.0: using cereal-0.5.3.0
Dependency containers ==0.5.5.1: using containers-0.5.5.1
Dependency hashable ==1.2.4.0: using hashable-1.2.4.0
Dependency mtl ==2.2.1: using mtl-2.2.1
Dependency scientific ==0.3.4.9: using scientific-0.3.4.9
Dependency text ==1.2.2.1: using text-1.2.2.1
Dependency time ==1.4.2: using time-1.4.2
Dependency transformers ==0.5.2.0: using transformers-0.5.2.0
Dependency transformers-compat ==0.5.1.4: using transformers-compat-0.5.1.4
Dependency unordered-containers ==0.2.7.1: using unordered-containers-0.2.7.1
Dependency void ==0.7.1: using void-0.7.1
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package transformers-compat-0.5.1.4 requires transformers-0.4.3.0
package tagged-0.8.5 requires transformers-0.4.3.0
package semigroups-0.18.2 requires transformers-0.4.3.0
package transformers-compat-0.5.1.4 requires transformers-0.5.2.0
package primitive-0.6.1.0 requires transformers-0.5.2.0
package mtl-2.2.1 requires transformers-0.5.2.0
package bytes-0.15.2 requires transformers-0.5.2.0
package bytes-0.15.2 requires transformers-compat-0.5.1.4
package tagged-0.8.5 requires transformers-compat-0.5.1.4
/opt/ghc/7.8.4/bin/ghc --info
Using Cabal-1.18.1.5 compiled by ghc-7.8
Using compiler: ghc-7.8.4
Using install prefix:
/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa
Binaries installed in:
/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/bin
Libraries installed in:
/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/lib
Private binaries installed in:
/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/libexec
Data files installed in:
/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/share
Documentation installed in:
/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/share/doc
Configuration files installed in:
/home/edsko/.cabal/store/ghc-7.8.4/bytes-0.15.2-be631f24a951556bb73090f0e973e674e0414ccfb9680943b05cdb305cc110aa/etc
Using alex version 3.1.7 found on system at: /home/edsko/bin/alex
Using ar found on system at: /usr/bin/ar
No c2hs found
No cpphs found
No ffihugs found
Using gcc version 5.4.0 found on system at: /usr/bin/gcc
Using ghc version 7.8.4 given by user at: /opt/ghc/7.8.4/bin/ghc
Using ghc-pkg version 7.8.4 given by user at: /opt/ghc/7.8.4/bin/ghc-pkg
No greencard found
Using haddock version 2.14.3 found on system at: /opt/ghc/7.8.4/bin/haddock
Using happy version 1.19.5 found on system at: /home/edsko/bin/happy
No hmake found
Using hpc version 0.67 found on system at: /opt/ghc/7.8.4/bin/hpc
Using hsc2hs version 0.67 found on system at: /opt/ghc/7.8.4/bin/hsc2hs
Using hscolour version 1.22 found on system at: /usr/bin/HsColour
No hugs found
No jhc found
Using ld found on system at: /usr/bin/ld
No lhc found
No lhc-pkg found
No nhc98 found
Using pkg-config version 0.29.1 found on system at: /usr/bin/pkg-config
Using ranlib found on system at: /usr/bin/ranlib
Using strip found on system at: /usr/bin/strip
Using tar found on system at: /bin/tar
No uhc found
creating dist/build/autogen
creating dist/build
creating dist/build/autogen
Component build order: library
creating dist/build
creating dist/build/autogen
Building bytes-0.15.2...
Preprocessing library bytes-0.15.2...
Building library...
/opt/ghc/7.8.4/bin/ghc --info
/opt/ghc/7.8.4/bin/ghc --info
creating dist/build
/opt/ghc/7.8.4/bin/ghc --make -fbuilding-cabal-package -O -static -dynamic-too -dynosuf dyn_o -dynhisuf dyn_hi -outputdir dist/build -odir dist/build -hidir dist/build -stubdir dist/build -i -idist/build -isrc -idist/build/autogen -Idist/build/autogen -Idist/build -optP-include -optPdist/build/autogen/cabal_macros.h -package-name bytes-0.15.2 -hide-all-packages -no-user-package-db -package-db /home/edsko/.cabal/store/ghc-7.8.4/package.db -package-db dist/package.conf.inplace -package-id base-4.7.0.2-bfd89587617e381ae01b8dd7b6c7f1c1 -package-id binary-0.7.1.0-f867dbbb69966feb9f5c4ef7695a70a5 -package-id bytestring-0.10.4.0-d6f1d17d717e8652498cab8269a0acd5 -package-id cereal-0.5.3.0-823d66e9d3614c88086ca60c6ff05e8298369b71ffe177a28a9bbf3d4d903bf1 -package-id containers-0.5.5.1-d4bd887fb97aa3a46cbadc13709b7653 -package-id hashable-1.2.4.0-2d5a1e1fa1c78ba1916a27b3f5f8be8aed3ac5780690c5200596c1896732e294 -package-id mtl-2.2.1-0cd5bb316632162ee65aa75123c0bb9e04211c640ecfd9885d76274ab62e6ea5 -package-id scientific-0.3.4.9-2373bac2e0be28e02b10d3e1bcdebfa6f12c27d2e9f2a95f17fec12b5d915d3e -package-id text-1.2.2.1-e6c96490ee353bbed2a105f823d09d2d04c1cc0aab12090fda992a8fc5cd54d1 -package-id time-1.4.2-9b3076800c33f8382c38628f35717951 -package-id transformers-0.5.2.0-8f4053c5ed06a19e4e5e0e81d25f840e66b9385aee3a3f2de9244c80fca94334 -package-id transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0 -package-id unordered-containers-0.2.7.1-33e23346dc31a4d8034e6457403f8192e063bd866e536a536e0eed156c6bb1b8 -package-id void-0.7.1-63f1539a3daefec962d731e1899ce5d9e3cb0f07e61d347dc264de4d5495b5c9 -XHaskell98 Data.Bytes.Get Data.Bytes.Put Data.Bytes.Serial Data.Bytes.Signed Data.Bytes.VarInt -Wall -fwarn-tabs -O2
<command line>: cannot satisfy -package-id transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0: 
    transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0 is shadowed by package transformers-compat-0.5.1.4-83b3d6616fe75d67e1e3fe3c937fd6caec1b4d1ab6d093d2964112fca1695d20
    (use -v for more information)

Failed to build distributive-0.5.0.2.
Build log (
/home/edsko/.cabal/logs/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194.log
):
[1 of 1] Compiling Main             ( /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/setup.hs, /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/Main.o )
Linking /home/edsko/wt/util/ghc-events-analyze/dist-newstyle/tmp/distributive-19759/distributive-0.5.0.2/dist/setup/setup ...
Configuring distributive-0.5.0.2...
Flags chosen: tagged=True
Dependency base ==4.7.0.2: using base-4.7.0.2
Dependency base-orphans ==0.5.4: using base-orphans-0.5.4
Dependency tagged ==0.8.5: using tagged-0.8.5
Dependency transformers ==0.5.2.0: using transformers-0.5.2.0
Dependency transformers-compat ==0.5.1.4: using transformers-compat-0.5.1.4
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package transformers-compat-0.5.1.4 requires transformers-0.4.3.0
package tagged-0.8.5 requires transformers-0.4.3.0
package transformers-compat-0.5.1.4 requires transformers-0.5.2.0
package distributive-0.5.0.2 requires transformers-0.5.2.0
package distributive-0.5.0.2 requires transformers-compat-0.5.1.4
package tagged-0.8.5 requires transformers-compat-0.5.1.4
/opt/ghc/7.8.4/bin/ghc --info
Using Cabal-1.18.1.5 compiled by ghc-7.8
Using compiler: ghc-7.8.4
Using install prefix:
/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194
Binaries installed in:
/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/bin
Libraries installed in:
/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/lib
Private binaries installed in:
/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/libexec
Data files installed in:
/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/share
Documentation installed in:
/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/share/doc
Configuration files installed in:
/home/edsko/.cabal/store/ghc-7.8.4/distributive-0.5.0.2-a019d6e07216983dfd9037b8bc4286146a98988f2d07da0d3b56369c05d40194/etc
Using alex version 3.1.7 found on system at: /home/edsko/bin/alex
Using ar found on system at: /usr/bin/ar
No c2hs found
No cpphs found
No ffihugs found
Using gcc version 5.4.0 found on system at: /usr/bin/gcc
Using ghc version 7.8.4 given by user at: /opt/ghc/7.8.4/bin/ghc
Using ghc-pkg version 7.8.4 given by user at: /opt/ghc/7.8.4/bin/ghc-pkg
No greencard found
Using haddock version 2.14.3 found on system at: /opt/ghc/7.8.4/bin/haddock
Using happy version 1.19.5 found on system at: /home/edsko/bin/happy
No hmake found
Using hpc version 0.67 found on system at: /opt/ghc/7.8.4/bin/hpc
Using hsc2hs version 0.67 found on system at: /opt/ghc/7.8.4/bin/hsc2hs
Using hscolour version 1.22 found on system at: /usr/bin/HsColour
No hugs found
No jhc found
Using ld found on system at: /usr/bin/ld
No lhc found
No lhc-pkg found
No nhc98 found
Using pkg-config version 0.29.1 found on system at: /usr/bin/pkg-config
Using ranlib found on system at: /usr/bin/ranlib
Using strip found on system at: /usr/bin/strip
Using tar found on system at: /bin/tar
No uhc found
creating dist/build/autogen
creating dist/build
creating dist/build/autogen
Component build order: library
creating dist/build
creating dist/build/autogen
Building distributive-0.5.0.2...
Preprocessing library distributive-0.5.0.2...
Building library...
/opt/ghc/7.8.4/bin/ghc --info
/opt/ghc/7.8.4/bin/ghc --info
creating dist/build
/opt/ghc/7.8.4/bin/ghc --make -fbuilding-cabal-package -O -static -dynamic-too -dynosuf dyn_o -dynhisuf dyn_hi -outputdir dist/build -odir dist/build -hidir dist/build -stubdir dist/build -i -idist/build -isrc -idist/build/autogen -Idist/build/autogen -Idist/build -optP-include -optPdist/build/autogen/cabal_macros.h -package-name distributive-0.5.0.2 -hide-all-packages -no-user-package-db -package-db /home/edsko/.cabal/store/ghc-7.8.4/package.db -package-db dist/package.conf.inplace -package-id base-4.7.0.2-bfd89587617e381ae01b8dd7b6c7f1c1 -package-id base-orphans-0.5.4-fdf1d64a4b0c66f9843abf759623dc215c31326bdf0e289a3bde5d409099be3c -package-id tagged-0.8.5-33434133bef2e1982b21de6780d251213ff54f39f45322ca28b506911320edd3 -package-id transformers-0.5.2.0-8f4053c5ed06a19e4e5e0e81d25f840e66b9385aee3a3f2de9244c80fca94334 -package-id transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0 -XHaskell98 Data.Distributive Data.Distributive.Generic -Wall
<command line>: cannot satisfy -package-id transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0: 
    transformers-compat-0.5.1.4-37539a700bd7bf0fb8c21bc253c7308c604f9a70e19db75e465930a0fdc2e4f0 is shadowed by package transformers-compat-0.5.1.4-83b3d6616fe75d67e1e3fe3c937fd6caec1b4d1ab6d093d2964112fca1695d20
    (use -v for more information)
cabal: Failed to build SVGFonts-1.6.0.0 because it depends on SVGFonts-1.6.0.0
which itself failed to build.
Failed to build active-0.2.0.11 because it depends on active-0.2.0.11 which
itself failed to build.
Failed to build adjunctions-4.3 because it depends on adjunctions-4.3 which
itself failed to build.
Failed to build bifunctors-5.4.1 because it depends on bifunctors-5.4.1 which
itself failed to build.
Failed to build bytes-0.15.2.
Failed to build comonad-5 because it depends on comonad-5 which itself failed
to build.
Failed to build diagrams-core-1.3.0.8 because it depends on
diagrams-core-1.3.0.8 which itself failed to build.
Failed to build diagrams-lib-1.3.1.4 because it depends on
diagrams-lib-1.3.1.4 which itself failed to build.
Failed to build diagrams-svg-1.4.0.4 because it depends on
diagrams-svg-1.4.0.4 which itself failed to build.
Failed to build distributive-0.5.0.2.
Failed to build dual-tree-0.2.0.9 because it depends on dual-tree-0.2.0.9
which itself failed to build.
Failed to build free-4.12.4 because it depends on free-4.12.4 which itself
failed to build.
Failed to build ghc-events-analyze-0.2.4 because it depends on
ghc-events-analyze-0.2.4 which itself failed to build.
Failed to build intervals-0.7.2 because it depends on intervals-0.7.2 which
itself failed to build.
Failed to build kan-extensions-5.0.1 because it depends on
kan-extensions-5.0.1 which itself failed to build.
Failed to build lens-4.14 because it depends on lens-4.14 which itself failed
to build.
Failed to build linear-1.20.5 because it depends on linear-1.20.5 which itself
failed to build.
Failed to build monoid-extras-0.4.2 because it depends on monoid-extras-0.4.2
which itself failed to build.
Failed to build profunctors-5.2 because it depends on profunctors-5.2 which
itself failed to build.
Failed to build semigroupoids-5.1 because it depends on semigroupoids-5.1
which itself failed to build.

[edsko]

Here too blowing away the store fixed the problem.

[hvr]

@ezyang fyi, this seems to be related to custom build types

[ezyang]

OK, after reading the tea leaves, here's what's going on.

• Nix-style local builds put all databases in a single package database, all of which have unique IPIDs. When we call out to the Cabal library to configure, we specify exactly what versions of every direct dependency we want using the --dependency flag, which lets us specify what IPID we want.
• In Cabal-1.18, there is no support for the --dependency flag. Thus, these flags are translated into --constraint flags which specify exactly what versions of the packages in question we want. BUT THIS IS INSUFFICIENT. There may be two choices for foo-0.2 which have ALL THE SAME transitive dependency choices; foo-0.2 might have been built with optimization in one case or without in another. So --constraint doesn't uniquely specify a package selection, and indeed the Cabal library's mini-solver is getting it wrong.
• This explains why blowing away the store works: Cabal can only go wrong when there are multiple choices of a package in the database. If you do a fresh install, there will only be one option and the Setup script will pick the right choice
• A sufficient workaround should be to set a constraint Cabal >= 1.20, when the --dependency flag was added.

Not sure what kind of fix we can apply.

[edsko]

So what does that mean? Any user with multiple choices for a package in their store will run into this problem unless they put a Cabal >= 1.20 constraint in their .cabal file?

[ezyang]

The specific situation this problem arises is (1) there is a Custom setup built with Cabal 1.18 or earlier, (2) there are multiple possible solutions for a particular set of constraints in the database, and (3) Setup chooses poorly.

We should fix it. I'm just not entirely sure how ;)

[edsko]

Oh, I see. I misunderstood. It's not that my .cabal file needs that constraint; it's the dependency with the custom setup script. I see.

[ezyang]

Yes. But if you put the constraint in your cabal.project that will be sufficient to apply it.

[dcoutts]

I see. So perhaps we have to say that new-build requires the Setup.hs to be later than 1.18.

[ezyang]

I'd be OK with that? Hopefully we can give a good error message when the Setup script doesn't work.