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-rw-r--r--pkgs/top-level/impure.nix4
1 files changed, 3 insertions, 1 deletions
diff --git a/pkgs/top-level/impure.nix b/pkgs/top-level/impure.nix
index 60a55c657c0..d8201a3569f 100644
--- a/pkgs/top-level/impure.nix
+++ b/pkgs/top-level/impure.nix
@@ -29,7 +29,9 @@
       dirCheck = dir: dir != "" && pathExists (dir + "/.");
       overlays = dir:
         let content = readDir dir; in
-        map (n: import "${dir}/${n}") (sort lessThan (attrNames content));
+        map (n: import "${dir}/${n}")
+          (builtins.filter (n: builtins.match ".*\.nix" n != null)
+            (sort lessThan (attrNames content)));
     in
       if dirEnv != "" then
         if dirCheck dirEnv then overlays dirEnv