krebs.build: simplify structure

krebs/3modules/build.nix

@@ -1,29 +1,28 @@
-{ config, lib, ... }:
+{ config, ... }:
 
 with config.krebs.lib;
 
-let
-  out = {
+{
+  options.krebs.build = {
     # TODO deprecate krebs.build.host
-    options.krebs.build.host = mkOption {
+    host = mkOption {
       type = types.host;
     };
 
     # TODO make krebs.build.profile shell safe
-    options.krebs.build.profile = mkOption {
+    profile = mkOption {
       type = types.str;
       default = "/nix/var/nix/profiles/system";
     };
 
-    # TODO deprecate krebs.build.user
-    options.krebs.build.user = mkOption {
-      type = types.user;
-    };
-
-    options.krebs.build.source = mkOption {
+    source = mkOption {
       type = types.attrsOf types.source;
       default = {};
     };
-  };
 
-in out
+    # TODO deprecate krebs.build.user
+    user = mkOption {
+      type = types.user;
+    };
+  };
+}