diff --git a/pkgs/os-specific/linux/ffado/default.nix b/pkgs/os-specific/linux/ffado/default.nix
index 0fc61d0e045f..15f3441e08aa 100644
--- a/pkgs/os-specific/linux/ffado/default.nix
+++ b/pkgs/os-specific/linux/ffado/default.nix
@@ -33,8 +33,7 @@ mkDerivation rec {
 
   prePatch = ''
     substituteInPlace ./support/tools/ffado-diag.in \
-      --replace /lib/modules/ "${kernel.dev}/lib/modules/" \
-      --replace 'stdout ("uname", "-r").rstrip ()' '"${kernel.modDirVersion}"'
+      --replace /lib/modules/ "/run/booted-system/kernel-modules/lib/modules/"
   '';
 
   patches = [