Wrap macos-only config behind platform detection

modules/lazygit.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
 {
   programs.lazygit = {
@@ -334,8 +334,8 @@
       
       # OS settings
       os = {
-        open = "open {{filename}}";
+        open = if pkgs.stdenv.isDarwin then "open {{filename}}" else "xdg-open {{filename}}";
-        openLink = "open {{link}}";
+        openLink = if pkgs.stdenv.isDarwin then "open {{link}}" else "xdg-open {{link}}";
       };
       
       # Disable startup popup

modules/nvim.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ pkgs, lib, ... }:
 
 {
   programs.nixvim = {
@@ -265,17 +265,21 @@
         }
       }
 
-      -- Unicode-safe file operations for macOS
+      -- Unicode-safe file operations
       function open_file_with_system_app()
         local filepath = vim.fn.expand('%:p')
         if filepath ~= "" then
           local escaped_path = vim.fn.shellescape(filepath)
-          vim.fn.system('open ' .. escaped_path)
+          ${if pkgs.stdenv.isDarwin then 
+            "vim.fn.system('open ' .. escaped_path)" 
+          else 
+            "vim.fn.system('xdg-open ' .. escaped_path)"}
         else
           print("No file to open")
         end
       end
 
+      ${lib.optionalString pkgs.stdenv.isDarwin ''
         function show_file_in_finder()
           local filepath = vim.fn.expand('%:p')
           if filepath ~= "" then
@@ -285,6 +289,7 @@
             print("No file to show")
           end
         end
+      ''}
     '';
   };
 }

modules/papis.nix

@@ -1,13 +1,13 @@
-{ pkgs, ... }:
+{ pkgs, lib, ... }:
 
 {
   # Papis configuration
-  home.file."Library/Application Support/papis/config".text = ''
+  home.file.${if pkgs.stdenv.isDarwin then "Library/Application Support/papis/config" else ".config/papis/config"}.text = ''
     [settings]
     default-library = main
     editor = nvim
-    opentool = open
+    opentool = ${if pkgs.stdenv.isDarwin then "open" else "xdg-open"}
-    file-browser = open
+    file-browser = ${if pkgs.stdenv.isDarwin then "open" else "xdg-open"}
     
     # Document management
     ref-format = {doc[author]}{doc[year]}
@@ -93,7 +93,8 @@
 
   # Shell functions for papis workflow
   programs.zsh.initContent = ''
-    # Papis finder function - open document directory in Finder with query support
+    # Papis finder function - open document directory with query support
+    ${lib.optionalString pkgs.stdenv.isDarwin ''
       pafinder() {
         local result=$(papis list "$@" | head -1)
         if [ -n "$result" ]; then
@@ -103,6 +104,18 @@
           return 1
         fi
       }
+    ''}
+    ${lib.optionalString (!pkgs.stdenv.isDarwin) ''
+      pafinder() {
+        local result=$(papis list "$@" | head -1)
+        if [ -n "$result" ]; then
+          xdg-open "$(dirname "$result")"
+        else
+          echo "No documents found"
+          return 1
+        fi
+      }
+    ''}
     
     # Papis add file function - add file to existing document with proper parameter handling
     pafile() {

modules/rsync.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
 {
   # Rsync exclude patterns for common files and directories
@@ -40,9 +40,11 @@
     --partial
     --partial-dir=.rsync-partial
     
+    ${lib.optionalString pkgs.stdenv.isDarwin ''
       # Preserve extended attributes and ACLs (macOS)
       --extended-attributes
       --acls
+    ''}
     
     # Network optimization
     --compress

modules/termscp.nix

@@ -1,7 +1,7 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
 {
-  home.file."Library/Application Support/termscp/config.toml".text = ''
+  home.file.${if pkgs.stdenv.isDarwin then "Library/Application Support/termscp/config.toml" else ".config/termscp/config.toml"}.text = ''
     # termscp configuration file
     # Generated by Nix - see modules/termscp.nix for customization
     

modules/zsh.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
 let
   projectsConfig = import ../config/projects.nix { homeDirectory = config.home.homeDirectory; };
@@ -21,16 +21,18 @@ in
     shellAliases = {
       ll = "ls -alF";
       zi = "z -i";  # Interactive selection with fzf
-      preview = "open -a Preview";
-      slide = "open -a SlidePilot";
-      pixel = "open -a 'Pixelmator Pro'";
-      inkscape = "open -a Inkscape";
 
       # Nix helpers
       hm = "home-manager";
       hms = "home-manager switch --flake ~/.config/nix#yanlin";
       hms-offline = "home-manager switch --flake ~/.config/nix#yanlin --option substitute false";
       
+    } // lib.optionalAttrs pkgs.stdenv.isDarwin {
+      # macOS-specific app aliases
+      preview = "open -a Preview";
+      slide = "open -a SlidePilot";
+      pixel = "open -a 'Pixelmator Pro'";
+      inkscape = "open -a Inkscape";
     };
     
     initContent = ''
@@ -115,7 +117,8 @@ in
         fi
       }
       
-      # Function to search and open all macOS applications
+      # Function to search and open all macOS applications (macOS only)
+      ${lib.optionalString pkgs.stdenv.isDarwin ''
         function app() {
           local app_path
           local file_to_open="$1"
@@ -138,6 +141,7 @@ in
             fi
           fi
         }
+      ''}
       
       # Interactive project launcher with fzf
       function proj() {