diff --git a/pkgs/build-support/build-mozilla-mach/default.nix b/pkgs/build-support/build-mozilla-mach/default.nix
index b7feccb768c0..75e94c5ccfd8 100644
--- a/pkgs/build-support/build-mozilla-mach/default.nix
+++ b/pkgs/build-support/build-mozilla-mach/default.nix
@@ -577,7 +577,7 @@ buildStdenv.mkDerivation {
       xorg.xorgproto
       zlib
       (
-        if (lib.versionAtLeast version "141") then nss_latest else nss_esr # 3.90
+        if (lib.versionAtLeast version "129") then nss_latest else nss_esr # 3.90
       )
     ]
     ++ lib.optional alsaSupport alsa-lib