diff --git a/hosts/perso-desktop/default.nix b/hosts/perso-desktop/default.nix
index 5c92d26..129c2b2 100644
--- a/hosts/perso-desktop/default.nix
+++ b/hosts/perso-desktop/default.nix
@@ -37,4 +37,8 @@
   #   gcc.tune = "x86-64-v3";
   #   system = "x86_64-linux";
   # };
+
+  environment.variables = {
+    NIX_BUILD_CORES = 16;
+  };
 }