diff --git a/flake.nix b/flake.nix
index c0e7a652..327541eb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,36 +13,38 @@
     };
   };
 
-  outputs = inputs@{ self, nixpkgs, home-manager, ... }:
-    let
-      vars = import ./lib/vars.nix;
-      specialArgs = {
-        inherit inputs;
-        inherit vars;
-      };
-    in {
-      nixosConfigurations = {
-        pc = nixpkgs.lib.nixosSystem {
-          inherit specialArgs;
-          system = "x86_64-linux";
-          modules = [
-            ./nixos-modules/common.nix
-            ./hosts/pc/default.nix
-            home-manager.nixosModules.home-manager
-            {
-              home-manager.useUserPackages = true;
-              home-manager.users.mat = import ./home-manager/home.nix;
-              home-manager.extraSpecialArgs = specialArgs;
-            }
-          ];
+  outputs = inputs@{ self, nixpkgs, home-manager, ... }: {
+    nixosConfigurations = {
+      pc = nixpkgs.lib.nixosSystem {
+        specialArgs = {
+          inherit inputs;
+          vars = (import ./lib/vars.nix) { isDarwin = false; };
         };
+        system = "x86_64-linux";
+        modules = [
+          ./nixos-modules/common.nix
+          ./hosts/pc/default.nix
+          home-manager.nixosModules.home-manager
+          {
+            home-manager.useUserPackages = true;
+            home-manager.users.mat = import ./home-manager/home.nix;
+            home-manager.extraSpecialArgs = {
+              inherit inputs;
+              vars = (import ./lib/vars.nix) { isDarwin = false; };
+            };
+          }
+        ];
       };
-      homeConfigurations = {
-        "mac" = home-manager.lib.homeManagerConfiguration {
-          extraSpecialArgs = specialArgs;
-          pkgs = nixpkgs.legacyPackages.aarch64-darwin;
-          modules = [ ./home-manager/home.nix ];
+    };
+    homeConfigurations = {
+      "mac" = home-manager.lib.homeManagerConfiguration {
+        extraSpecialArgs = {
+          inherit inputs;
+          vars = (import ./lib/vars.nix) { isDarwin = true; };
         };
+        pkgs = nixpkgs.legacyPackages.aarch64-darwin;
+        modules = [ ./home-manager/home.nix ];
       };
     };
+  };
 }
diff --git a/home-manager/modules/fish.nix b/home-manager/modules/fish.nix
index 0ebd3e0c..d2235d33 100644
--- a/home-manager/modules/fish.nix
+++ b/home-manager/modules/fish.nix
@@ -1,4 +1,4 @@
-{ pkgs, lib, ... }:
+{ pkgs, lib, vars, ... }:
 let
   inherit (pkgs) stdenv;
   inherit (stdenv) isLinux;
@@ -33,6 +33,8 @@ in {
     }];
 
     shellAliases = {
+      copy = vars.copyCmd;
+      paste = vars.pasteCmd;
       cat = "bat";
       gogit = "cd ~/git";
       "!!" = "eval \\$history[1]";
diff --git a/home-manager/modules/git.nix b/home-manager/modules/git.nix
index ee93ecc3..31ebb513 100644
--- a/home-manager/modules/git.nix
+++ b/home-manager/modules/git.nix
@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ pkgs, vars, ... }:
 let
   inherit (pkgs) git stdenv;
   inherit (stdenv) isLinux;
@@ -30,9 +30,7 @@ in {
       ch = "!${git_checkout_fzf_script}";
       add-ignore-whitespace =
         "!git diff --ignore-all-space | git apply --cached";
-      copy-branch = "!git branch --show-current | ${
-          if isLinux then "xclip -sel clip" else "pbcopy"
-        }";
+      copy-branch = "!git branch --show-current | ${vars.copyCmd}";
       pending = "!git log $(git describe --tags --abbrev=0)..HEAD --oneline";
     };
     extraConfig = {
diff --git a/lib/vars.nix b/lib/vars.nix
index 8ff55bb4..aef75b41 100644
--- a/lib/vars.nix
+++ b/lib/vars.nix
@@ -1,5 +1,8 @@
+{ isDarwin }:
 let usePantheon = false;
 in {
   inherit usePantheon;
   useGnome = !usePantheon;
+  copyCmd = if isDarwin then "pbcopy" else "xclip -selection clipboard";
+  pasteCmd = if isDarwin then "pbpaste" else "xlip -o -selection clipboard";
 }