diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
index db38ebd8b708..127f3225c297 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
@@ -130,4 +130,7 @@ self: super: {
   inline-c-cpp =
     (if isDarwin then appendConfigureFlags ["--ghc-option=-fcompact-unwind"] else x: x)
     super.inline-c-cpp;
+
+  # 2022-05-31: weeder 2.3.0 requires GHC 9.2
+  weeder = doDistribute self.weeder_2_3_1;
 }
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index d295ad3d63df..15d16ff2307d 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -124,6 +124,7 @@ extra-packages:
   - ormolu == 0.2.*                     # 2022-02-21: For ghc 8.8 and 8.10
   - ShellCheck == 0.7.2                 # 2022-02-20: haskell-ci 0.14 needs this
   - weeder == 2.2.*                     # 2022-02-21: preserve for GHC 8.10.7
+  - weeder == 2.3.*                     # 2022-05-31: preserve for GHC 9.0.2
   - attoparsec == 0.13.*                # 2022-02-23: Needed to compile elm for now
   - relude == 0.7.0.0                   # 2022-02-25: Needed for ema 0.6
   - SVGFonts < 1.8                      # 2022-03-19: Needed for Chart-diagrams 1.9.3
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index e77a614b27bf..61a3763d6b1b 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -295834,6 +295834,32 @@ self: {
        maintainers = with lib.maintainers; [ maralorn ];
      }) {};
 
+  "weeder_2_3_1" = callPackage
+    ({ mkDerivation, algebraic-graphs, base, bytestring, containers
+     , dhall, directory, filepath, generic-lens, ghc, lens, mtl
+     , optparse-applicative, regex-tdfa, text, transformers
+     }:
+     mkDerivation {
+       pname = "weeder";
+       version = "2.3.1";
+       sha256 = "16hgfhchmnp32wvcx9r464azycvdq1gsjmnjmnw995y9cp27ayy1";
+       isLibrary = true;
+       isExecutable = true;
+       libraryHaskellDepends = [
+         algebraic-graphs base bytestring containers dhall directory
+         filepath generic-lens ghc lens mtl optparse-applicative regex-tdfa
+         text transformers
+       ];
+       executableHaskellDepends = [
+         base bytestring containers directory filepath ghc
+         optparse-applicative transformers
+       ];
+       description = "Detect dead code";
+       license = lib.licenses.bsd3;
+       hydraPlatforms = lib.platforms.none;
+       maintainers = with lib.maintainers; [ maralorn ];
+     }) {};
+
   "weeder" = callPackage
     ({ mkDerivation, algebraic-graphs, base, bytestring, containers
      , dhall, directory, filepath, generic-lens, ghc, lens, mtl