diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index 5f4ac7b84645..6746e4b1ec63 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -271,7 +271,7 @@ lib.extendMkDerivation {
             if (isPythonModule drv) && (isMismatchedPython drv) then throwMismatch attrName drv else drv;
 
         in
-        attrName: inputs: map (checkDrv attrName) inputs;
+        attrName: map (checkDrv attrName);
 
       isBootstrapInstallPackage = isBootstrapInstallPackage' (finalAttrs.pname or null);