diff --git a/maintainers/scripts/build.nix b/maintainers/scripts/build.nix
index 9b2bf00c803a..bc4355d0aa8e 100644
--- a/maintainers/scripts/build.nix
+++ b/maintainers/scripts/build.nix
@@ -13,8 +13,12 @@ let
           let
             result = builtins.tryEval
               (
-                if pkgs.lib.isDerivation pkg && cond name pkg
-                then [ (return name pkg) ]
+                if pkgs.lib.isDerivation pkg && cond name pkg then
+                  # Skip packages whose closure fails on evaluation.
+                  # This happens for pkgs like `python27Packages.djangoql`
+                  # that have disabled Python pkgs as dependencies.
+                  builtins.seq pkg.outPath
+                    [ (return name pkg) ]
                 else if pkg.recurseForDerivations or false || pkg.recurseForRelease or false
                 then packagesWith cond return pkg
                 else [ ]