remove nixpkgs dependency

YIPPIE YIPPIE YIPPIE

TODO.md

@@ -13,6 +13,9 @@
 - [X] rename nixos-modules/ to nixos/
 - [X] ensure all machines are in groups.all by default
 
+- [X] fix nixpkgs.nix not working (default not respected)
+- [X] remove dependence on nixpkgs
+
 ## Low Priority
 - [ ] rename extraModules to modules?
 - [ ] rename specialArgs to args?

cerulean/nexus/nexus.nix

@@ -15,7 +15,6 @@
   self,
   this,
   nt,
-  lib,
   inputs,
   ...
 }: let
@@ -50,13 +49,8 @@
       (nt.naive.terminal)
       Terminal
       ;
-
-    missing = msg: path:
-      Terminal (abort ''
-        Each Cerulean Nexus node is required to specify ${msg}!
-        Ensure `nexus.${path}` exists under your call to `cerulean.mkNexus`.
-      '');
   in {
+    base = null;
     extraModules = [];
     specialArgs = Terminal {};
 
@@ -188,8 +182,13 @@ in {
     customOutputs = removeAttrs decl ["nexus"];
 
     outputs = rec {
-      nixosConfigurations = mapNodes nexus.nodes (
-        nodeName: node: let
+      nixosConfigurations = mapNodes nexus (
+        {
+          lib,
+          nodeName,
+          node,
+          ...
+        }: let
           nixosDecl = lib.nixosSystem {
             system = node.system;
             specialArgs = let
@@ -219,7 +218,11 @@ in {
           nixosDecl
       );
 
-      deploy.nodes = mapNodes nexus.nodes (nodeName: node: let
+      deploy.nodes = mapNodes nexus ({
+        nodeName,
+        node,
+        ...
+      }: let
         inherit
           (node.deploy)
           activationTimeout

cerulean/nexus/nodes.nix

@@ -25,6 +25,12 @@ in rec {
       (nt.naive.terminal)
       Terminal
       ;
+
+    missing = msg: path:
+      Terminal (abort ''
+        Each Cerulean Nexus node is required to specify ${msg}!
+        Ensure `nexus.${path}` exists under your call to `cerulean.mkNexus`.
+      '');
   in {
     enabled = true;
     system = "x86_64-linux"; # sane default (i hope...)
@@ -32,6 +38,8 @@ in rec {
     extraModules = [];
     specialArgs = Terminal {};
 
+    base = null;
+
     deploy = {
       user = "root";
       sudo = "sudo -u";
@@ -67,7 +75,25 @@ in rec {
     in
       nt.projectOnto templateAttrs nodeAttrs;
 
-  mapNodes = nodes: f:
-    nodes
-    |> mapAttrs (nodeName: nodeAttrs: f nodeName (parseNode nodeName nodeAttrs));
+  mapNodes = nexus: f:
+    nexus.nodes
+    |> mapAttrs (nodeName: nodeAttrs: let
+      node = parseNode nodeName nodeAttrs;
+
+      # use per-node base or default to nexus base
+      base =
+        if node.base != null
+        then node.base
+        else if nexus.base != null
+        then nexus.base
+        else
+          abort ''
+            Cerulean cannot construct nexus node "${nodeName}" without a base package source.
+            Ensure `nexus.nodes.*.base` or `nexus.base` is a flake reference to the github:NixOS/nixpkgs repository.
+          '';
+    in
+      f {
+        inherit nodeName node;
+        lib = base.lib;
+      });
 }

flake.nix

@@ -16,7 +16,7 @@
 
   inputs = {
     systems.url = "github:nix-systems/default";
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
+    # nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
     nt.url = "github:cry128/nt";
 
     home-manager = {
@@ -37,14 +37,12 @@
 
   outputs = {
     self,
-    nixpkgs,
     nt,
     ...
   } @ inputs:
     import ./cerulean
     {
       inherit inputs self nt;
-      inherit (nixpkgs) lib;
       inherit (nt) mix;
     };
 }