diff --git a/pkgs/development/compilers/edk2/default.nix b/pkgs/development/compilers/edk2/default.nix
index 809fc6a4cf1..58c4ff568ad 100644
--- a/pkgs/development/compilers/edk2/default.nix
+++ b/pkgs/development/compilers/edk2/default.nix
@@ -33,6 +33,7 @@ edk2 = stdenv.mkDerivation {
   buildInputs = [ libuuid pythonEnv ];
 
   makeFlags = "-C BaseTools";
+  NIX_CFLAGS_COMPILE = "-Wno-return-type -Wno-error=stringop-truncation";
 
   hardeningDisable = [ "format" "fortify" ];