diff --git a/pkgs/build-support/build-mozilla-mach/default.nix b/pkgs/build-support/build-mozilla-mach/default.nix
index 5117b979f686..73d1ccef9574 100644
--- a/pkgs/build-support/build-mozilla-mach/default.nix
+++ b/pkgs/build-support/build-mozilla-mach/default.nix
@@ -293,7 +293,14 @@ buildStdenv.mkDerivation {
   pname = "${pname}-unwrapped";
   version = packageVersion;
 
-  inherit src unpackPhase meta;
+  inherit src unpackPhase;
+
+  meta =
+    meta
+    // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
+      # MacOS builds may take a long time and sometimes hit the default timeout
+      timeout = lib.max (24 * 60 * 60) (meta.timeout or 0);
+    };
 
   outputs = [
     "out"