custom package function

lib/checks.nix

@@ -1,5 +1,11 @@
-{ inputs, system }:
+{
+  inputs,
+  system,
+  lib,
+}:
 let
+  inherit (builtins) map;
+  inherit (lib) pkgFromSystem pkgsFromSystem;
   pkgs = import inputs.nixpkgs {
     inherit system;
     overlays = [
@@ -8,28 +14,33 @@ let
       inputs.nixpkgs-wayland.overlay
     ];
   };
+  pkgsFrom = pkgsFromSystem system;
+  pkgFrom = pkgFromSystem system;
 in
 {
   makePackages =
     pkgs.runCommandLocal "build-third-party"
       {
         src = ./.;
-        nativeBuildInputs = [
-          pkgs.pixi
-          pkgs.swww
-          pkgs.nixVersions.stable
-
-          inputs.hyprland.packages.${pkgs.system}.default
-          inputs.hyprland.packages.${pkgs.system}.xdg-desktop-portal-hyprland
-
-          inputs.tsm.packages.${pkgs.system}.default
-          inputs.hyprman.packages.${pkgs.system}.default
-
-          inputs.roc.packages.${pkgs.system}.full # cli + lang_server
-
-          inputs.zls.outputs.packages.${pkgs.system}.default
-          inputs.zig2nix.outputs.packages.${pkgs.system}.zig.master.bin
-        ];
+        nativeBuildInputs =
+          [
+            pkgs.pixi
+            pkgs.swww
+            pkgs.nixVersions.stable
+          ]
+          ++ (map [
+            "tsm"
+            "hyprman"
+            "zls"
+          ] pkgFrom)
+          ++ (with pkgsFrom "hyprland"; [
+            default
+            xdg-desktop-portal-hyprland
+          ])
+          ++ [
+            (pkgsFrom "roc").full
+            (pkgsFrom "zig2nix").zig.master.bin
+          ];
       }
       ''
         mkdir "$out"

lib/default.nix

@@ -1,6 +1,6 @@
 inputs@{ nixpkgs, self, ... }:
 let
-  lib = nixpkgs.lib.extend (import ./extended.nix);
+  lib = nixpkgs.lib.extend (import ./extended.nix inputs);
 
   inherit (builtins) mapAttrs readDir listToAttrs;
   inherit (lib) genAttrs;
@@ -30,7 +30,7 @@ let
     checks = forAllSystems (
       pkgs:
       import ./checks.nix {
-        inherit inputs;
+        inherit inputs lib;
         system = pkgs.system;
       }
     );

lib/extended.nix

@@ -1,4 +1,4 @@
-final: prev:
+inputs: final: prev:
 let
   inherit (builtins) listToAttrs substring filter;
   inherit (final)
@@ -71,6 +71,10 @@ let
   filterNotDefaultNixFile = paths: filter (p: !(isDefaultNixFile p) && (isNixFile p)) paths;
   listNixFilesRecursive = dir: filterNotDefaultNixFile (listFilesRecursive dir);
 
+  # defaultLinuxPackage = flake: flake.packages.x86_64-linux.default;
+  # defaultPackageGeneric = system: flake: "${flake}.packages.${system}.default";
+  pkgsFromSystem = system: flake: inputs."${flake}".packages."${system}";
+  pkgFromSystem = system: flake: (pkgsFromSystem system flake).default;
 in
 {
   inherit
@@ -85,5 +89,7 @@ in
     isNixFile
     listNixFilesRecursive
     flakeVer
+    pkgsFromSystem
+    pkgFromSystem
     ;
 }

lib/generators.nix

@@ -13,24 +13,24 @@ let
     mkOizysModule
     enabled
     enableAttrs
+    pkgsFromSystem
+    pkgFromSystem
     ;
   inherit (lib.filesystem) listFilesRecursive;
 
+  pkgFrom = pkgFromSystem "x86_64-linux";
+  pkgsFrom = pkgsFromSystem "x86_64-linux";
+
   mkIso = nixosSystem {
     system = "x86_64-linux";
     modules = [
       self.nixosModules.nix
       self.nixosModules.essentials
       (
-        {
-          self,
-          pkgs,
-          modulesPath,
-          ...
-        }:
+        { pkgs, modulesPath, ... }:
         {
           imports = [ (modulesPath + "/installer/cd-dvd/installation-cd-minimal.nix") ];
-          environment.systemPackages = (with pkgs; [ neovim ]) ++ [ self.packages.${pkgs.system}.default ];
+          environment.systemPackages = (with pkgs; [ neovim ]) ++ [ (pkgFrom "self") ];
         }
       )
     ];
@@ -64,6 +64,8 @@ let
           enabled
           enableAttrs
           hostName
+          pkgFrom
+          pkgsFrom
           ;
       };
     };

modules/desktop/gui.nix

@@ -3,6 +3,7 @@
   pkgs,
   config,
   lib,
+  pkgFrom,
   ...
 }:
 let
@@ -10,26 +11,26 @@ let
 in
 {
   config = mkIf config.oizys.desktop.enable {
-    environment.systemPackages = with pkgs; [
-      wezterm
-      alacritty
+    environment.systemPackages =
+      [ (pkgFrom "f1multiviewer") ]
+      ++ (with pkgs; [
+        wezterm
+        alacritty
 
-      xfce.thunar
+        xfce.thunar
 
-      inkscape
-      gimp
+        inkscape
+        gimp
 
-      zotero
+        zotero
 
-      libreoffice-qt
-      hunspell # spell check for libreoffice
+        libreoffice-qt
+        hunspell # spell check for libreoffice
 
-      (catppuccin-gtk.override {
-        accents = [ "rosewater" ];
-        variant = "mocha";
-      })
-
-      inputs.f1multiviewer.outputs.packages.${pkgs.system}.default
-    ];
+        (catppuccin-gtk.override {
+          accents = [ "rosewater" ];
+          variant = "mocha";
+        })
+      ]);
   };
 }

modules/desktop/window-managers/hyprland.nix

@@ -4,6 +4,8 @@
   config,
   mkOizysModule,
   enabled,
+  pkgFrom,
+  pkgsFrom,
   ...
 }:
 
@@ -41,12 +43,10 @@ mkOizysModule config "hyprland" {
 
       catppuccin-cursors.mochaDark
     ])
-    ++ [
-      inputs.hyprman.packages.${pkgs.system}.default
-    ]
+    ++ [ (pkgFrom "hyprman") ]
 
     # swww-git is broken
-    ++ (with inputs.nixpkgs-wayland.packages.${pkgs.system}; [
+    ++ (with (pkgsFrom "nixpkgs-wayland"); [
       mako
       eww
       wlr-randr

modules/development/cli.nix

@@ -4,6 +4,7 @@
   config,
   enabled,
   mkDefaultOizysModule,
+  pkgFrom,
   ...
 }:
 mkDefaultOizysModule config "cli" {
@@ -35,5 +36,5 @@ mkDefaultOizysModule config "cli" {
       btop
       gdu
     ])
-    ++ [ inputs.tsm.packages.${pkgs.system}.tsm ];
+    ++ [ (pkgFrom "tsm") ];
 }

modules/languages/python.nix

@@ -3,6 +3,7 @@
   config,
   lib,
   pkgs,
+  pkgFrom,
   ...
 }:
 let
@@ -10,7 +11,7 @@ let
   cfg = config.oizys.languages;
 
   python = pkgs.python3.withPackages (ps: with ps; [ pip ]);
-  pixi = inputs.pixi.packages.${pkgs.system}.default;
+  pixi = pkgFrom "pixi";
 in
 {
   config = mkIfIn "python" cfg {

modules/languages/roc.nix

@@ -1,8 +1,8 @@
 {
   config,
   lib,
-  pkgs,
   inputs,
+  pkgsFrom,
   ...
 }:
 let
@@ -10,14 +10,13 @@ let
 
   version = flakeVer inputs.roc;
   cfg = config.oizys.languages;
-  rocPkgs = inputs.roc.packages.${pkgs.system};
+  rocPkgs = pkgsFrom "roc";
   # I'm setting the versions so the changes are more apparent as flake is updated
   roc = rocPkgs.cli.overrideAttrs {
     inherit version;
 
   };
   lang-server = rocPkgs.lang-server.overrideAttrs { inherit version; };
-
 in
 {
   config = mkIfIn "roc" cfg {

modules/languages/zig.nix

@@ -1,17 +1,15 @@
 {
-  inputs,
   config,
   lib,
-  pkgs,
+  pkgsFrom,
+  pkgFrom,
   ...
 }:
 let
   inherit (lib) mkIfIn;
   cfg = config.oizys.languages;
-  zig = inputs.zig2nix.outputs.packages.${pkgs.system}.zig.master.bin;
-  zls = inputs.zls.outputs.packages.${pkgs.system}.default.overrideAttrs {
-    nativeBuildInputs = [ zig ];
-  };
+  zig = (pkgsFrom "zig2nix").zig.master.bin;
+  zls = (pkgFrom "zls").overrideAttrs { nativeBuildInputs = [ zig ]; };
 in
 {
   config = mkIfIn "zig" cfg {

modules/nix.nix

@@ -4,6 +4,7 @@
   pkgs,
   lib,
   enabled,
+  pkgFrom,
   ...
 }:
 let
@@ -31,7 +32,7 @@ in
     pkgs.nixfmt-rfc-style
     pkgs.nix-output-monitor
 
-    self.packages.${pkgs.system}.default
+    (pkgFrom "self")
   ];
 
   programs.nix-index-database.comma = enabled;