diff --git a/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix b/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
index 945b9287ed00..b934f44da90b 100644
--- a/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
+++ b/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
@@ -22,8 +22,10 @@
 # /lib will link to /lib32
 
 let
-  is64Bit = stdenv.hostPlatform.parsed.cpu.bits == 64;
-  isMultiBuild  = multiPkgs != null && is64Bit;
+  inherit (stdenv) is64Bit;
+
+  # use of glibc_multi is only supported on x86_64-linux
+  isMultiBuild  = multiPkgs != null && stdenv.isx86_64 && stdenv.isLinux;
   isTargetBuild = !isMultiBuild;
 
   # list of packages (usually programs) which are only be installed for the