avoid the with keyword

flake.nix

@@ -35,18 +35,15 @@
     nib,
     deploy-rs,
     ...
-  } @ inputs:
-    with builtins;
-    with nib.types; let
+  } @ inputs: let
     lib = nixpkgs.lib;
 
-      sys = with nib;
-        mkUSys {
-          pkgs = withPkgs nixpkgs {
+    sys = nib.mkUSys {
+      pkgs = nib.withPkgs nixpkgs {
         config.allowUnfree = false;
-            overlays = attrValues self.overlays;
+        overlays = builtins.attrValues self.overlays;
       };
-          upkgs = withPkgs nixpkgs-unstable {
+      upkgs = nib.withPkgs nixpkgs-unstable {
         config.allowUnfree = false;
       };
     };
@@ -67,6 +64,8 @@
     mkNexusConfig = config: let
       # abstract node instance that stores all default values
       templateNode = name: system: let
+        Terminal = nib.types.Terminal;
+
         missing = msg: path:
           Terminal (abort ''
             Each Cerulean Nexus node is required to specify ${msg}!
@@ -104,11 +103,11 @@
       };
 
       parseNode = name: nodeAttrs:
-          if !(isAttrs nodeAttrs)
+        if !(builtins.isAttrs nodeAttrs)
         then
           # fail if node is not an attribute set
           abort ''
-              Cerulean Nexus nodes must be provided as an attribute set, got "${typeOf nodeAttrs}" instead!
+            Cerulean Nexus nodes must be provided as an attribute set, got "${builtins.typeOf nodeAttrs}" instead!
             Ensure all `cerulean.nexus.nodes.${name}` declarations are attribute sets under your call to `cerulean.mkNexus`.
           ''
         # TODO: nodeAttrs.system won't display any nice error messages!!
@@ -117,7 +116,7 @@
           templateAttrs = templateNode name nodeAttrs.system;
           S = nib.parse.parseStructFor templateAttrs nodeAttrs;
         in
-            unwrapRes (_:
+          nib.types.unwrapRes (_:
             abort ''
               Cerulean failed to parse `cerulean.nexus.nodes.${name}`!
               mergeStruct should never return `result.Err`... How are you here?!?
@@ -125,7 +124,7 @@
           S;
 
       # TODO: mapNodes = f: mapAttrs (name: nodeAttrs: f name (parseNode name nodeAttrs)) config.nexus.nodes
-        mapNodes = f: mapAttrs f (mapAttrs parseNode config.nexus.nodes);
+      mapNodes = f: builtins.mapAttrs f (builtins.mapAttrs parseNode config.nexus.nodes);
     in rec {
       nixosConfigurations = mapNodes (
         _: node:
@@ -161,14 +160,14 @@
           sshOpts =
             node.deploy.ssh.opts
             ++ (
-                if elem "-p" node.deploy.ssh.opts
+              if builtins.elem "-p" node.deploy.ssh.opts
               then []
               else ["-p" (toString node.deploy.ssh.port)]
             );
         };
       });
 
-        checks = mapAttrs (system: deployLib: deployLib.deployChecks deploy) deploy-rs.lib;
+      checks = builtins.mapAttrs (system: deployLib: deployLib.deployChecks deploy) deploy-rs.lib;
     };
 
     mkNexus = outputs: let