diff --git a/pkgs/build-support/build-fhs-userenv/env.nix b/pkgs/build-support/build-fhs-userenv/env.nix
index 9c91090dc5c..d951fb9ab06 100644
--- a/pkgs/build-support/build-fhs-userenv/env.nix
+++ b/pkgs/build-support/build-fhs-userenv/env.nix
@@ -52,6 +52,7 @@ let
     export LOCALE_ARCHIVE='/usr/lib/locale/locale-archive'
     export LD_LIBRARY_PATH='/run/opengl-driver/lib:/run/opengl-driver-32/lib:/usr/lib:/usr/lib32'
     export PATH='/run/wrappers/bin:/usr/bin:/usr/sbin'
+    export TZDIR='/etc/zoneinfo'
 
     # Force compilers and other tools to look in default search paths
     unset NIX_ENFORCE_PURITY