diff --git a/elisp-packages.nix b/elisp-packages.nix
index 22c3b82..0f43a94 100644
--- a/elisp-packages.nix
+++ b/elisp-packages.nix
@@ -75,7 +75,7 @@
     '';
     buildPhase = ''
       runHook preBuild
-      make
+      make -j$NIX_BUILD_CORES
       runHook postBuild
     '';
     installPhase = ''