drop darwin targets bc I can’t build them

flake.nix

@@ -13,26 +13,31 @@
     cargo2nix.inputs.flake-utils.follows = "flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils, rust-overlay, cargo2nix, ... } @ args: flake-utils.lib.eachDefaultSystem (system:
-    let
-      overlays = [ cargo2nix.overlay ];
-      pkgs = import nixpkgs {
-        inherit system overlays;
-      };
-      git-mit = pkgs.rustBuilder.makePackageSet' {
-        packageFun = import ./git-mit/Cargo.nix;
-        workspaceSrc = pkgs.fetchFromGitHub {
-          owner = "PurpleBooth";
-          repo = "git-mit";
-          rev = "0aa22b8e2baafc392c9b6d7a01cc1806f09e2194";
-          sha256 = "059hkl0xm818ahr829g8f2hn8c4x2ilhbbq6v21ycf9r3hyj65ld";
+  outputs = { self, nixpkgs, flake-utils, rust-overlay, cargo2nix, ... } @ args: flake-utils.lib.eachSystem [
+    "x86_64-linux"
+    "aarch64-linux"
+    "i686-linux"
+  ]
+    (system:
+      let
+        overlays = [ cargo2nix.overlay ];
+        pkgs = import nixpkgs {
+          inherit system overlays;
         };
-        packageOverrides = pkgs: pkgs.rustBuilder.overrides.all;
-        rustChannel = "1.59.0";
-      };
-    in
-    rec {
-      packages = builtins.mapAttrs (_: f: (f { }).bin) git-mit.workspace;
-      hydraJobs = packages;
-    });
+        git-mit = pkgs.rustBuilder.makePackageSet' {
+          packageFun = import ./git-mit/Cargo.nix;
+          workspaceSrc = pkgs.fetchFromGitHub {
+            owner = "PurpleBooth";
+            repo = "git-mit";
+            rev = "0aa22b8e2baafc392c9b6d7a01cc1806f09e2194";
+            sha256 = "059hkl0xm818ahr829g8f2hn8c4x2ilhbbq6v21ycf9r3hyj65ld";
+          };
+          packageOverrides = pkgs: pkgs.rustBuilder.overrides.all;
+          rustChannel = "1.59.0";
+        };
+      in
+      rec {
+        packages = builtins.mapAttrs (_: f: (f { }).bin) git-mit.workspace;
+        hydraJobs = packages;
+      });
 }