From fcae9a11d062a6e67701ce3fed63fd27f04426dd Mon Sep 17 00:00:00 2001
From: matthewcroughan <matt@croughan.sh>
Date: Thu, 31 Mar 2022 17:40:00 +0100
Subject: [PATCH] Provide pkgs in forAllSystems

This is stolen from DavHau's dream2nix flake which reworks forAllSystems to provide two arguments, the pkgs and the system.
---
 flake.nix | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/flake.nix b/flake.nix
index e54f503..779c589 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,8 +7,11 @@
     let
       version = builtins.substring 0 8 self.lastModifiedDate;
       supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
-      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
-      nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; overlays = [ self.overlay ]; });
+      forSystems = systems: f:
+        nixpkgs.lib.genAttrs systems
+        (system: f system nixpkgs.legacyPackages.${system});
+      forAllSystems = forSystems supportedSystems;
+      nixpkgsFor = forAllSystems (system: pkgs: import nixpkgs { inherit system; overlays = [ self.overlay ]; });
     in rec
     {
       overlay = final: prev: {
@@ -69,6 +72,6 @@
                );
           };
         };
-      nixinate = forAllSystems (system: nixpkgsFor.${system}.generateApps);
+      nixinate = forAllSystems (system: pkgs: nixpkgsFor.${system}.generateApps);
     };
 }