diff --git a/flake.nix b/flake.nix
index 9689201..6f926d9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -123,15 +123,8 @@
           packages.default = beamPackages.mixRelease {
             inherit pname version;
 
-            buildInputs = [ ] ++ lib.optionals isDarwin (with pkgs.darwin.apple_sdk.frameworks; [
-              CoreFoundation
-              CoreServices
-            ]) ++ lib.optionals isLinux (with pkgs; [
-              inotify-tools
-            ]);
-
             src = gitignoreSource ./.;
-            mixNixDeps = import ./mix.nix { inherit lib beamPackages; };
+            mixNixDeps = import ./mix.nix { inherit pkgs lib beamPackages; };
           };
 
           process-compose."${pname}-dev" =
diff --git a/mix.nix b/mix.nix
index 7f99935..e6c2f65 100644
--- a/mix.nix
+++ b/mix.nix
@@ -1,10 +1,13 @@
-{ lib, beamPackages, overrides ? (x: y: { }) }:
+{ pkgs, lib, beamPackages, overrides ? (x: y: { }) }:
 
 let
   buildRebar3 = lib.makeOverridable beamPackages.buildRebar3;
   buildMix = lib.makeOverridable beamPackages.buildMix;
   buildErlangMk = lib.makeOverridable beamPackages.buildErlangMk;
 
+  inherit (pkgs.stdenv) isDarwin;
+  inherit (pkgs.stdenv) isLinux;
+
   self = packages // (overrides self packages);
 
   packages = with beamPackages; with self; {
@@ -148,6 +151,13 @@ let
         sha256 = "1p0myxmnjjds8bbg69dd6fvhk8q3n7lb78zd4qvmjajnzgdmw6a1";
       };
 
+      buildInputs = [ ] ++ lib.optionals isDarwin (with pkgs.darwin.apple_sdk.frameworks; [
+        CoreFoundation
+        CoreServices
+      ]) ++ lib.optionals isLinux (with pkgs; [
+        inotify-tools
+      ]);
+
       beamDeps = [ ];
     };