set bash and zsh prompts in system config

system/common.nix

@@ -2,6 +2,7 @@
 
 {
   environment.pathsToLink = [ "/share/zsh" ];
+  environment.shells = [ pkgs.bashInteractive pkgs.zsh ];
   environment.systemPackages = [ pkgs.coreutils-full ];
   environment.variables.LANG = "en_US.UTF-8";
   environment.variables.LANGUAGE = "en_US.UTF-8";
@@ -18,13 +19,24 @@
     settings.trusted-users = [ "root" "willem" ];
   };
 
-  
+
   programs.nix-index.enable = false;
 
+  programs.bash.enable = true;
+  programs.bash.enableCompletion = true;
+  programs.bash.interactiveShellInit = ''
+    export PS1=$'\n'"\e[0mbash: \e[34;1m\w"$'\n'"\e[32m\\$\e[0m "
+  '';
+
+  programs.man.enable = true;
+
   programs.zsh.enable = true;
   programs.zsh.enableBashCompletion = true;
+  programs.zsh.promptInit = ''
+    autoload -U promptinit && promptinit
+    export PROMPT=$'\n'"%B%F{blue}%3~"$'\n'"%F{green}%(!.#.$) %f%b"
+    export RPROMPT="%B%F{red}%*%f%b"
+  '';
 
   time.timeZone = "America/Vancouver";
-
-  users.users.willem.shell = pkgs.zsh;
 }

system/zeus.darwin.nix

@@ -34,10 +34,6 @@
     };
   };
 
-  programs.bash.enable = true;
-
-  programs.man.enable = true;
-
   programs.zsh.loginShellInit = ''
     reexec() {
         unset __NIX_DARWIN_SET_ENVIRONMENT_DONE