diff --git a/pkgs/by-name/mu/multipath-tools/package.nix b/pkgs/by-name/mu/multipath-tools/package.nix
index ae52507b8464..e3c252848759 100644
--- a/pkgs/by-name/mu/multipath-tools/package.nix
+++ b/pkgs/by-name/mu/multipath-tools/package.nix
@@ -51,6 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
   strictDeps = true;
 
   makeFlags = [
+    "WARN_ONLY=1"
     "LIB=lib"
     "prefix=$(out)"
     "systemd_prefix=$(out)"