Start refactoring

- remove emacs
- remove inputs
- trying to speed up evaluation
- update inputs

modules/nix/default.nix

@@ -32,12 +32,13 @@
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
         "mlabs.cachix.org-1:gStKdEqNKcrlSQw5iMW6wFCj3+b+1ASpBVY2SYuNV2M="
       ];
+      # deprecated-features = [ "url-literals" ];
     };
 
-    nixPath = ["nixpkgs=${fleetFlake.inputs.nixpkgsUnstable}"];
+    nixPath = ["nixpkgs=${fleetFlake.inputs.nixpkgs}"];
 
     extraOptions = ''
-      experimental-features = nix-command flakes ca-derivations impure-derivations
+      experimental-features = nix-command flakes impure-derivations
       builders-use-substitutes = true
     '';
 
@@ -50,19 +51,11 @@
     registry = lib.mkForce ({
         nixpkgs.to = {
           type = "path";
-          path = fleetFlake.inputs.nixpkgsUnstable;
-        };
-        nixpkgsUnstable.to = {
-          type = "path";
-          path = fleetFlake.inputs.nixpkgsUnstable;
-        };
-        nixpkgsStable.to = {
-          type = "path";
-          path = fleetFlake.inputs.nixpkgsStable;
+          path = fleetFlake.inputs.nixpkgs;
         };
         n.to = {
           type = "path";
-          path = fleetFlake.inputs.nixpkgsUnstable;
+          path = fleetFlake.inputs.nixpkgs;
         };
       }
       // (lib.optionalAttrs (builtins.hasAttr "ccr" config) {
@@ -92,11 +85,11 @@
         sshKey = "/home/${config.ccr.username}/.ssh/id_rsa";
       }
       ++ (lib.lists.optional (config.networking.hostName == "picard") {
-        hostName = "mac.staging.mlabs.city";
+        hostName = "mac.staging.mlabs.city?remote-program=/run/current-system/sw/bin/nix-store";
         system = "x86_64-darwin";
         maxJobs = 4;
         supportedFeatures = ["kvm" "nixos-test" "big-parallel" "benchmark"];
-        protocol = "ssh-ng";
+        protocol = "ssh";
         sshUser = "root";
         sshKey = "/home/${config.ccr.username}/.ssh/id_rsa";
       });