diff --git a/pkgs/development/compilers/llvm/7/llvm.nix b/pkgs/development/compilers/llvm/7/llvm.nix
index 533333d49723..5bb629931fd5 100644
--- a/pkgs/development/compilers/llvm/7/llvm.nix
+++ b/pkgs/development/compilers/llvm/7/llvm.nix
@@ -49,9 +49,10 @@ in stdenv.mkDerivation (rec {
 
   patches = [
     # https://bugs.llvm.org/show_bug.cgi?id=39427
+    # https://github.com/NixOS/nixpkgs/issues/54370
     (fetchpatch {
-      url = "https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/raw/5a7d283d4e00bc4822c7b0226e593c344c8f6050/debian/patches/pr39427-misscompile.diff";
-      sha256 = "03mpydsaw0xvcp7kb4sgjzcl5v22620r5z78kv3mz5wp7sn76fg5";
+      url = "https://github.com/llvm-mirror/llvm/commit/57567def148f387153a8149fb590bd39b1b006a1.patch";
+      sha256 = "1w1xg5pxpc6cals1nf5j5k4p6qi8lcrpvn0paxc86m415i79xmcg";
     })
     # backport, fix building rust crates with lto
     (fetchpatch {