diff --git a/pkgs/tools/networking/curl/default.nix b/pkgs/tools/networking/curl/default.nix
index 5979a32cac49..3fc6d760bceb 100644
--- a/pkgs/tools/networking/curl/default.nix
+++ b/pkgs/tools/networking/curl/default.nix
@@ -168,7 +168,7 @@ stdenv.mkDerivation (finalAttrs: {
     inherit opensslSupport openssl;
     tests = {
       withCheck = finalAttrs.finalPackage.overrideAttrs (_: { doCheck = true; });
-      fetchpatch = tests.fetchpatch.simple.override { fetchpatch = fetchpatch.override { fetchurl = useThisCurl fetchurl; }; };
+      fetchpatch = tests.fetchpatch.simple.override { fetchpatch = (fetchpatch.override { fetchurl = useThisCurl fetchurl; }) // { version = 1; }; };
       curlpp = useThisCurl curlpp;
       coeurl = useThisCurl coeurl;
       haskell-curl = useThisCurl haskellPackages.curl;