librem: enableParallelBuilding=true

pkgs/development/libraries/librem/default.nix

@@ -17,6 +17,7 @@ stdenv.mkDerivation rec {
   ++ lib.optional (stdenv.cc.cc != null) "SYSROOT_ALT=${lib.getDev stdenv.cc.cc}"
   ++ lib.optional (stdenv.cc.libc != null) "SYSROOT=${lib.getDev stdenv.cc.libc}"
   ;
+  enableParallelBuilding = true;
   meta = {
     description = "A library for real-time audio and video processing";
     homepage = "https://github.com/baresip/rem";