diff --git a/pkgs/development/libraries/qt-5/5.15/default.nix b/pkgs/development/libraries/qt-5/5.15/default.nix
index dabb77ea0c85d94..1f9157e4a6651e2 100644
--- a/pkgs/development/libraries/qt-5/5.15/default.nix
+++ b/pkgs/development/libraries/qt-5/5.15/default.nix
@@ -23,7 +23,7 @@ Check for any minor version changes.
 
 let
 
-  srcs = import ./srcs.nix { inherit lib fetchgit fetchFromGitHub; } // { __attrsFailEvaluation = true; };
+  srcs = import ./srcs.nix { inherit lib fetchgit fetchFromGitHub; };
 
   qtCompatVersion = srcs.qtbase.version;
 
diff --git a/pkgs/top-level/qt5-packages.nix b/pkgs/top-level/qt5-packages.nix
index 331c97d5a4d3ea9..21dc6a23d2188c9 100644
--- a/pkgs/top-level/qt5-packages.nix
+++ b/pkgs/top-level/qt5-packages.nix
@@ -69,9 +69,7 @@ makeScopeWithSplicing' {
     };
   in (lib.makeOverridable mkMaui attrs);
 
-  noExtraAttrs = set:
-    lib.attrsets.removeAttrs set [ "extend" "override" "overrideScope" "overrideScope'" "overrideDerivation" ]
-    // { __attrsFailEvaluation = true; };
+  noExtraAttrs = set: lib.attrsets.removeAttrs set [ "extend" "override" "overrideScope" "overrideScope'" "overrideDerivation" ];
 
 in (noExtraAttrs (kdeFrameworks // plasmaMobileGear // plasma5 // plasma5.thirdParty // kdeGear // mauiPackages // qt5 // {