fix: enable installing npm modules globally

user/modules/dev.nix

@@ -6,7 +6,7 @@
     # Javascript
     nodejs
     nodePackages.yarn
-    nodePackages.pnpm
+    unstable.nodePackages.pnpm
     # PHP
     php
     # Python
@@ -23,4 +23,15 @@
       extensions = [ "rust-src" ];
     })
   ];
+  home.file.npmrc = {
+    enable = true;
+    target = ".npmrc";
+    text = ''
+      prefix = ''${HOME}/.npm-packages
+    '';
+  };
+  programs.zsh.initExtra = ''
+    export PATH=~/.npm-packages/bin:$PATH
+    export NODE_PATH=~/.npm-packages/lib/node_modules
+  '';
 }