fix: less unstable, nixpkgs via krops git, NIX_PATH on makanek

systems wanted to build glibc all the time when updated

systems/makanek/configuration.nix

@@ -45,6 +45,8 @@ in
     ];
   };
 
+  nix.nixPath = [ "/var/src" ];
+
   networking = {
     firewall.allowedTCPPorts = [ 80 443 ];
     hostName = "makanek";