1 files changed, 6 insertions, 2 deletions
diff --git a/pkgs/build-support/fetchfile/default.nix b/pkgs/build-support/fetchfile/default.nix
index bdddfab2b4d6..685c1e69520a 100644
--- a/pkgs/build-support/fetchfile/default.nix
+++ b/pkgs/build-support/fetchfile/default.nix
@@ -1,7 +1,11 @@
-{stdenv}: {pathname, md5}: stdenv.mkDerivation {
+{stdenv}: {pathname, md5 ? "", sha256 ? ""}: stdenv.mkDerivation {
   name = baseNameOf (toString pathname);
   builder = ./builder.sh;
   pathname = pathname;
-  md5 = md5;
+} // if (sha256 == "") then {
+  md5 = (stdenv.lib.fetchMD5warn "fetchfile" pathname md5);
   id = md5;
+} else {
+  sha256 = sha256;
+  id = sha256;
 }