diff --git a/flake.lock b/flake.lock
index 5d54006241..a26965d76a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -84,21 +84,6 @@
         "type": "github"
       }
     },
-    "flake-utils_2": {
-      "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "fourmolu": {
       "flake": false,
       "locked": {
@@ -240,23 +225,6 @@
         "url": "https://hackage.haskell.org/package/lsp-test-0.14.0.3/lsp-test-0.14.0.3.tar.gz"
       }
     },
-    "myst-parser": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1650933355,
-        "narHash": "sha256-Osd3urvH1bn9w/6sAMyLKHO7gxuYePpGJ9y8ReBfp4E=",
-        "owner": "smunix",
-        "repo": "MyST-Parser",
-        "rev": "57d0d78169a0e157406c35df951bdffdf94b4f9b",
-        "type": "github"
-      },
-      "original": {
-        "owner": "smunix",
-        "ref": "fix.hls-docutils",
-        "repo": "MyST-Parser",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1663112159,
@@ -273,41 +241,6 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1663165252,
-        "narHash": "sha256-H9OiflDQy1vLu1w5yz46qWfGdcFBpS8VnPRLP0bsiZE=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "bde85b0815144b77763732e0f32918017480e6b5",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "poetry2nix": {
-      "inputs": {
-        "flake-utils": "flake-utils_2",
-        "nixpkgs": "nixpkgs_2"
-      },
-      "locked": {
-        "lastModified": 1662879385,
-        "narHash": "sha256-ZmiyHn0uPH4xHYcOhY0e0sPtfyM6jCF/shmVq2aTOLc=",
-        "owner": "nix-community",
-        "repo": "poetry2nix",
-        "rev": "4f8d61cd936f853242a4ce1fd476f5488c288c26",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "ref": "master",
-        "repo": "poetry2nix",
-        "type": "github"
-      }
-    },
     "ptr-poker": {
       "flake": false,
       "locked": {
@@ -351,32 +284,12 @@
         "implicit-hie-cradle": "implicit-hie-cradle",
         "lsp": "lsp",
         "lsp-test": "lsp-test",
-        "myst-parser": "myst-parser",
         "nixpkgs": "nixpkgs",
-        "poetry2nix": "poetry2nix",
         "ptr-poker": "ptr-poker",
         "retrie": "retrie",
-        "sphinx_rtd_theme": "sphinx_rtd_theme",
         "stylish-haskell": "stylish-haskell"
       }
     },
-    "sphinx_rtd_theme": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1628276861,
-        "narHash": "sha256-fzqi0QfDSiN8YXtAiWXIoOlyHZQI4V32uOKZjPfWeWY=",
-        "owner": "readthedocs",
-        "repo": "sphinx_rtd_theme",
-        "rev": "34f81daaf52466366c80003db293d50075c1b896",
-        "type": "github"
-      },
-      "original": {
-        "owner": "readthedocs",
-        "repo": "sphinx_rtd_theme",
-        "rev": "34f81daaf52466366c80003db293d50075c1b896",
-        "type": "github"
-      }
-    },
     "stylish-haskell": {
       "flake": false,
       "locked": {
diff --git a/flake.nix b/flake.nix
index b9774bdf14..d417f444db 100644
--- a/flake.nix
+++ b/flake.nix
@@ -91,16 +91,6 @@
       url = "https://hackage.haskell.org/package/hie-bios-0.11.0/hie-bios-0.11.0.tar.gz";
       flake = false;
     };
-    myst-parser = {
-      url = "github:smunix/MyST-Parser?ref=fix.hls-docutils";
-      flake = false;
-    };
-    # For https://github.com/readthedocs/sphinx_rtd_theme/pull/1185, otherwise lists are broken locally
-    sphinx_rtd_theme = {
-      url = "github:readthedocs/sphinx_rtd_theme?rev=34f81daaf52466366c80003db293d50075c1b896";
-      flake = false;
-    };
-    poetry2nix.url = "github:nix-community/poetry2nix/master";
   };
   outputs =
     inputs@{ self, nixpkgs, flake-compat, flake-utils, gitignore, all-cabal-hashes-unpacked, ... }:
@@ -221,7 +211,7 @@
       let
         pkgs = import nixpkgs {
           inherit system;
-          overlays = [ self.overlays.default inputs.poetry2nix.overlay ];
+          overlays = [ self.overlays.default ];
           config = { allowBroken = true; };
         };
 
@@ -246,26 +236,7 @@
         ghc942 = supportedGHCs.ghc942;
         ghcDefault = supportedGHCs.default;
 
-        # For markdown support
-        myst-parser = pkgs.poetry2nix.mkPoetryEnv {
-          projectDir = inputs.myst-parser;
-          python = pkgs.python39;
-          overrides = [
-            pkgs.poetry2nix.defaultPoetryOverrides
-          ];
-        };
-        sphinx_rtd_theme = pkgs.poetry2nix.mkPoetryEnv {
-          projectDir = inputs.sphinx_rtd_theme;
-          python = pkgs.python39;
-          overrides = [
-            pkgs.poetry2nix.defaultPoetryOverrides
-            (self: super: {
-              # The RTD theme doesn't work with newer docutils
-              docutils = pkgs.python3Packages.callPackage ./docutils.nix {};
-            })
-          ];
-        };
-        pythonWithPackages = pkgs.python3.withPackages (ps: [ps.sphinx myst-parser sphinx_rtd_theme ps.pip]);
+        pythonWithPackages = pkgs.python3.withPackages (ps: [ps.sphinx ps.myst-parser ps.sphinx_rtd_theme ps.pip]);
 
         docs = pkgs.stdenv.mkDerivation {
           name = "hls-docs";