feat: initial macos setup

home/alex/default.nix

@@ -1,24 +1,34 @@
-{ pkgs, ... }: {
+{ pkgs, lib, isDarwin, ... }:
+
+let
+  # Modules that only make sense on Linux, either because they use systemd,
+  # KDE/Plasma, or a package that nixpkgs only builds for Linux. On macOS the
+  # equivalents are installed as Homebrew casks (see modules/darwin.nix).
+  linuxOnly = lib.optionals (!isDarwin) [
+    ../modules/plasma.nix
+    ../modules/dropbox.nix
+    ../modules/globalprotect.nix
+    ../modules/gimp.nix
+    ../modules/libreoffice.nix
+    ../modules/masterpdfeditor.nix
+    ../modules/pymol.nix
+    ../modules/zoom.nix
+  ];
+in
+{
   home.username = "alex";
-  home.homeDirectory = "/home/alex";
+  home.homeDirectory = if isDarwin then "/Users/alex" else "/home/alex";
   home.stateVersion = "25.11";
   home.sessionPath = [ "$HOME/.local/bin" ];
 
   imports = [
     ../modules/datalad.nix
     ../modules/docker.nix
-    ../modules/dropbox.nix
     ../modules/fonts.nix
     ../modules/ghostty.nix
-    ../modules/gimp.nix
-    ../modules/globalprotect.nix
     ../modules/helix.nix
     ../modules/hyperfine.nix
-    ../modules/libreoffice.nix
-    ../modules/masterpdfeditor.nix
     ../modules/pixi.nix
-    ../modules/plasma.nix
-    ../modules/pymol.nix
     ../modules/python.nix
     ../modules/rust.nix
     ../modules/ssh.nix
@@ -28,21 +38,21 @@
     ../modules/yazi.nix
     ../modules/zellij.nix
     ../modules/zig.nix
-    ../modules/zoom.nix
     ../modules/zsh.nix
     ./git.nix
     ./gh.nix
-  ];
+  ] ++ linuxOnly;
 
   home.packages = with pkgs; [
     atool
     httpie
     just
-    spotify
-    brave
     git-lfs
     typst
     unzip
     glow
+  ] ++ lib.optionals (!isDarwin) [
+    spotify
+    brave
   ];
 }

home/modules/ghostty.nix

@@ -1,4 +1,4 @@
-{ pkgs, lib, ... }:
+{ pkgs, lib, isDarwin, ... }:
 let
   baseKeybinds = [
     "ctrl+t=new_tab"
@@ -16,7 +16,10 @@ in
 {
   programs.ghostty = {
     enable = true;
-    
+    # nixpkgs `ghostty` is the Linux/GTK build (Linux-only meta.platforms).
+    # On macOS use `ghostty-bin`, the repackaged official .dmg.
+    package = if isDarwin then pkgs.ghostty-bin else pkgs.ghostty;    
+
     settings = {
       # Font Settings
       "font-family" = "Roboto Mono";
@@ -93,8 +96,8 @@ in
 
       # Keybindings (Tabs & Splits)
       "keybind" = baseKeybinds
-        ++ lib.optionals pkgs.stdenv.isDarwin [ "super+d=unbind" ];
-    } // lib.optionalAttrs pkgs.stdenv.isDarwin {
+        ++ lib.optionals isDarwin [ "super+d=unbind" ];
+    } // lib.optionalAttrs isDarwin {
       "macos-titlebar-style" = "transparent";
       "macos-icon" = "official";
     };

home/modules/vscode.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }: {
+{ pkgs, lib, isDarwin, ... }: {
   programs.vscodium = {
     enable = true;
     package = pkgs.vscodium;
@@ -18,12 +18,16 @@
         rust-lang.rust-analyzer
         timonwong.shellcheck
         unifiedjs.vscode-mdx
-        yzane.markdown-pdf
       ]) ++ pkgs.nix4vscode.forOpenVsx [
         "akamud.vscode-theme-onedark"
         "astral-sh.ty"
         "modular-mojotools.vscode-mojo"
-      ];
+      ] ++ lib.optionals (!isDarwin) (with pkgs.vscode-extensions; [
+        # markdown-pdf pins ungoogled-chromium (Linux-only) as its PDF
+        # renderer. On macOS, install it from the marketplace by hand and set
+        # markdown-pdf.executablePath to Chrome/Brave, or render via typst.
+        yzane.markdown-pdf
+      ]);
 
       userSettings = {
         "editor.fontFamily" = "'JetBrains Mono', monospace";

home/modules/zed.nix

@@ -2,7 +2,7 @@
 {
   programs.zed-editor = {
     enable = true;
-    package = pkgs.zed-editor-fhs;
+    package = pkgs.zed-editor;
     mutableUserSettings = true;
 
     userSettings = {

home/modules/zsh.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ pkgs, lib, isDarwin, ... }:
 
 {
   programs.zsh = {
@@ -12,7 +12,7 @@
       la = "ls -A";
       l = "ls -CF";
       tp = "tree -I '__init__*' -I '__pycache__'";
-      clear = "/run/current-system/sw/bin/clear";
+      clear = "${pkgs.ncurses}/bin/clear";
       zide = "zellij --layout ide";
     };
 
@@ -45,6 +45,11 @@
     '';
   };
   home.sessionVariables = {
-    TERMINFO_DIRS = "${pkgs.ghostty}/share/terminfo:${pkgs.ncurses}/share/terminfo";
+    # ghostty (GTK) ships terminfo under $out/share on Linux. The macOS
+    # ghostty-bin bundles its own, so only add ncurses there.
+    TERMINFO_DIRS = lib.concatStringsSep ":" (
+      lib.optional (!isDarwin) "${pkgs.ghostty}/share/terminfo"
+      ++ [ "${pkgs.ncurses}/share/terminfo" ]
+    );
   };
 }