separate runtime dependencies

this is only intended to be temporary until the flake is updated

flake.lock

@@ -55,9 +55,26 @@
       "inputs": {
         "mmdoc": "mmdoc",
         "nixpkgs": "nixpkgs",
+        "runtimeDeps": "runtimeDeps",
         "treefmt-nix": "treefmt-nix"
       }
     },
+    "runtimeDeps": {
+      "locked": {
+        "lastModified": 1714247354,
+        "narHash": "sha256-6dFKqP/aCKIdpOgqgIQUrRT0NOfVc14ftNcdELa4Pu4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c8d7c8a78fb516c0842cc65346506a565c88014d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable-small",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "treefmt-nix": {
       "inputs": {
         "nixpkgs": [

flake.nix

@@ -7,10 +7,12 @@
   inputs.treefmt-nix.url = "github:numtide/treefmt-nix";
   inputs.treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
 
+  inputs.runtimeDeps.url = "github:NixOS/nixpkgs/nixos-unstable-small";
+
   nixConfig.extra-substituters = "https://nix-community.cachix.org";
   nixConfig.extra-trusted-public-keys = "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=";
 
-  outputs = { self, nixpkgs, mmdoc, treefmt-nix } @ args:
+  outputs = { self, nixpkgs, mmdoc, treefmt-nix, runtimeDeps } @ args:
     let
       systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
       eachSystem = f: nixpkgs.lib.genAttrs systems (system: f nixpkgs.legacyPackages.${system});

pkgs/default.nix

@@ -1,5 +1,6 @@
 { nixpkgs
 , mmdoc
+, runtimeDeps
 , system
 , self
 , ...
@@ -7,9 +8,11 @@
 
 let
 
+  runtimePkgs = import runtimeDeps { inherit system; };
+
   pkgs = import nixpkgs { inherit system; config = { allowBroken = true; }; };
 
-  drvAttrs = attrs: with pkgs; {
+  drvAttrs = attrs: with runtimePkgs; {
     NIX = nix;
     GIT = git;
     JQ = jq;