feat(nimbolus): init a http terraform backend

machines/nixos/compute01/nimbolus.nix

@@ -6,6 +6,8 @@
   pkgs,
   sources,
   config,
+  meta,
+  nixpkgs,
   ...
 }:
 let
@@ -13,6 +15,18 @@ let
   port = 9008;
 in
 {
+  nixpkgs.overlays =
+    if meta.nodes."web01".nixpkgs.version == "25.05" then
+      throw "This overlay should be removed"
+    else
+      [
+        (_: super: {
+          lib = super.lib // {
+            inherit (nixpkgs.nixos."25.05".lib) concatMapAttrsStringSep;
+          };
+        })
+      ];
+
   services.nimbolus-tf = {
     enable = true;
     package = (import sources.kat-pkgs { inherit pkgs; }).nimbolus-tf-backend;

modules/nixos/nimbolus-tf.nix

@@ -10,6 +10,7 @@
 }:
 let
   inherit (lib)
+    concatMapAttrsStringSep
     escapeShellArg
     getExe
     mkEnableOption
@@ -23,12 +24,6 @@ let
     str
     ;
 
-  # from nixpkgs, commit b1371135b5db3fcf728114d92d5bd0218109598a
-  # FIXME: Should be replaced by nixpkgs lib when going to nixos-25.05
-  concatMapAttrsStringSep =
-    sep: f: attrs:
-    lib.concatStringsSep sep (lib.attrValues (lib.mapAttrs f attrs));
-
   cfg = config.services.nimbolus-tf;
 in
 {