diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index e2dc2dbe35e..15dca1c0bc5 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -454,4 +454,8 @@ self: super: builtins.intersectAttrs super {
       export PATH="$PWD/dist/build/intero:$PATH"
     '';
   });
+
+  # loc and loc-test depend on each other for testing. Break that infinite cycle:
+  loc-test = super.loc-test.override { loc = dontCheck self.loc; };
+
 }