diff --git a/pkgs/by-name/mu/multipath-tools/package.nix b/pkgs/by-name/mu/multipath-tools/package.nix
index 8f5aca898c61..d4ac1953cdc3 100644
--- a/pkgs/by-name/mu/multipath-tools/package.nix
+++ b/pkgs/by-name/mu/multipath-tools/package.nix
@@ -55,6 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
     "LIB=lib"
     "prefix=$(out)"
     "systemd_prefix=$(out)"
+    "etc_prefix=/"
     "kernel_incdir=${linuxHeaders}/include/"
     "man8dir=$(out)/share/man/man8"
     "man5dir=$(out)/share/man/man5"