feat: add rust build deps

configuration.nix

@@ -54,10 +54,6 @@
 
   hardware.pulseaudio.enable = true;
   
-  programs.gnupg.agent = {
-    enable = true;
-  };
-
   environment.systemPackages = with pkgs; [
     neovim
     git

home-mandlm.nix

@@ -18,6 +18,8 @@
       cargo
       rustc
       gcc
+      pkg-config
+      openssl
     ];
 
     file = {
@@ -33,6 +35,12 @@
     stateVersion = "22.05";
   };
 
+  services.gpg-agent = {
+    enable = true;
+    enableZshIntegration = true;
+    pinentryFlavor = "gnome3";
+  };
+
   programs = {
     fzf = {
       enable = true;