diff --git a/pkgs/build-support/fetchurl/default.nix b/pkgs/build-support/fetchurl/default.nix
index 5ffb70e3a9f8a..3bcf68b6d86b5 100644
--- a/pkgs/build-support/fetchurl/default.nix
+++ b/pkgs/build-support/fetchurl/default.nix
@@ -237,6 +237,11 @@ lib.extendMkDerivation {
     in
 
     derivationArgs
+    # Compatibility layer for empty-string pname/version exclusion for Nixpkgs 25.11.
+    // lib.optionalAttrs (!(lib.oldestSupportedReleaseIsAtLeast 2511)) (
+      lib.optionalAttrs (pname == "") { pname = null; }
+      // lib.optionalAttrs (version == "") { version = null; }
+    )
     // {
       name =
         if finalAttrs.pname or null != null && finalAttrs.version or null != null then