diff --git a/default.nix b/default.nix
index a484819a6..52c9ea705 100644
--- a/default.nix
+++ b/default.nix
@@ -149,6 +149,7 @@ rec {
       inherit postgrest devCabalOptions withTools;
       ghc = pkgs.haskell.compiler."${compiler}";
       inherit (pkgs.haskell.packages."${compiler}") hpc-codecov;
+      inherit (pkgs.haskell.packages."${compiler}") weeder;
     };
 
   withTools =
diff --git a/nix/tools/tests.nix b/nix/tools/tests.nix
index e8c66bfe7..e04df8a54 100644
--- a/nix/tools/tests.nix
+++ b/nix/tools/tests.nix
@@ -5,12 +5,12 @@
 , ghc
 , glibcLocales
 , gnugrep
-, haskellPackages
 , hpc-codecov
 , jq
 , postgrest
 , python3
 , runtimeShell
+, weeder
 , withTools
 , yq
 }:
@@ -137,7 +137,7 @@ let
 
         (
           trap 'echo Found dead code: Check file list above.' ERR ;
-          ${haskellPackages.weeder}/bin/weeder --config=./test/weeder.dhall
+          ${weeder}/bin/weeder --config=./test/weeder.dhall
         )
 
         # collect all tests