diff --git a/pkgs/build-support/build-mozilla-mach/default.nix b/pkgs/build-support/build-mozilla-mach/default.nix
index 86d780979a72..834654bee746 100644
--- a/pkgs/build-support/build-mozilla-mach/default.nix
+++ b/pkgs/build-support/build-mozilla-mach/default.nix
@@ -90,6 +90,7 @@ in
   nspr,
   nss_esr,
   nss_3_114,
+  nss_3_115,
   nss_latest,
   onnxruntime,
   pango,
@@ -573,8 +574,10 @@ buildStdenv.mkDerivation {
       xorg.xorgproto
       zlib
       (
-        if (lib.versionAtLeast version "143") then
+        if (lib.versionAtLeast version "144") then
           nss_latest
+        else if (lib.versionAtLeast version "143") then
+          nss_3_115
         else if (lib.versionAtLeast version "141") then
           nss_3_114
         else