diff --git a/pkgs/development/haskell-modules/make-package-set.nix b/pkgs/development/haskell-modules/make-package-set.nix
index b79aace9e3b7..d272f7375a82 100644
--- a/pkgs/development/haskell-modules/make-package-set.nix
+++ b/pkgs/development/haskell-modules/make-package-set.nix
@@ -205,7 +205,7 @@ in package-set { inherit pkgs lib callPackage; } self // {
     callCabal2nixWithOptions = name: src: extraCabal2nixOptions: args:
       let
         filter = path: type:
-                   pkgs.lib.hasSuffix "${name}.cabal" path ||
+                   pkgs.lib.hasSuffix ".cabal" path ||
                    baseNameOf path == "package.yaml";
         expr = self.haskellSrc2nix {
           inherit name extraCabal2nixOptions;