diff --git a/pkgs/build-support/build-fhs-userenv/env.nix b/pkgs/build-support/build-fhs-userenv/env.nix
index 23568f51b23e..c0f741b62886 100644
--- a/pkgs/build-support/build-fhs-userenv/env.nix
+++ b/pkgs/build-support/build-fhs-userenv/env.nix
@@ -196,4 +196,5 @@ in stdenv.mkDerivation {
     ${if isMultiBuild then extraBuildCommandsMulti else ""}
   '';
   preferLocalBuild = true;
+  allowSubstitutes = false;
 }