Don't install alacritty on neelix or non-graphical installs.

nix/configuration/hosts/neelix/default.nix

@@ -23,9 +23,9 @@
   # Mount tmpfs at /tmp
   boot.tmp.useTmpfs = true;
 
+  me.bluetooth.enable = true;
+  me.emacs_flavor = "plainmacs";
   me.graphical = true;
   me.graphicsCardType = "intel";
-
   me.kodi.enable = true;
-  me.bluetooth.enable = true;
 }

nix/configuration/hosts/odo/default.nix

@@ -29,9 +29,10 @@
     fw-ectool
   ];
 
+  me.alacritty.enable = true;
+  me.ansible.enable = true;
+  me.emacs_flavor = "full";
   me.graphical = true;
   me.graphicsCardType = "amd";
-
   me.sway.enable = true;
-  me.ansible.enable = true;
 }

nix/configuration/roles/alacritty/default.nix

@@ -7,7 +7,18 @@
 
 {
   imports = [ ];
+  options.me = {
+    alacritty.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install alacritty.";
+    };
+  };
 
+  config = lib.mkIf config.me.alacritty.enable (
+    lib.mkMerge [
+      (lib.mkIf config.me.graphical {
         environment.systemPackages = with pkgs; [
           alacritty
           xdg-utils # for xdg-open
@@ -20,5 +31,8 @@
               source = ./files/alacritty.toml;
             };
           };
+      })
+    ]
+  );
 
 }

nix/configuration/roles/emacs/default.nix

@@ -6,7 +6,9 @@
 }:
 
 let
-  plainmacs = pkgs.writeShellScriptBin "plainmacs" ''
+  plainmacs =
+    emacs_package:
+    pkgs.writeShellScriptBin "plainmacs" ''
       INIT_SCRIPT=$(cat <<EOF
       (progn
         (setq make-backup-files nil auto-save-default nil create-lockfiles nil)
@@ -34,57 +36,38 @@ let
       EOF
       )
 
-    exec ${pkgs.emacs29-pgtk}/bin/emacs -q --eval "$INIT_SCRIPT" "''${@}"
+      exec ${emacs_package}/bin/emacs -q --eval "$INIT_SCRIPT" "''${@}"
     '';
-  e_shorthand = pkgs.writeShellScriptBin "e" ''
+  e_shorthand =
-    exec ${pkgs.emacs_full}/bin/emacs "''${@}"
+    emacs_package:
+    pkgs.writeShellScriptBin "e" ''
+      exec ${emacs_package}/bin/emacs "''${@}"
     '';
 in
 {
   imports = [ ];
 
-  config = lib.mkMerge [
+  options.me.emacs_flavor = lib.mkOption {
+    type = lib.types.nullOr (
+      lib.types.enum [
+        "full"
+        "plainmacs"
+      ]
+    );
+    default = null;
+    example = "full";
+    description = "What flavor of emacs to set up.";
+  };
+
+  config = lib.mkIf (config.me.emacs_flavor != null) (
+    lib.mkMerge [
       {
         environment.systemPackages = with pkgs; [
-        plainmacs
+          my_emacs
-        e_shorthand
+          (plainmacs my_emacs)
-        emacs_full
+          (e_shorthand my_emacs)
         ];
 
-      nixpkgs.overlays = [
-        (final: prev: {
-          emacs_full = pkgs.symlinkJoin {
-            name = "emacs_full";
-            paths = [ pkgs.emacs29-pgtk ];
-            buildInputs = [ pkgs.makeWrapper ];
-            postBuild = ''
-              wrapProgram $out/bin/emacs --prefix PATH : ${
-                lib.makeBinPath [
-                  (pkgs.aspellWithDicts (
-                    dicts: with dicts; [
-                      en
-                      en-computers
-                    ]
-                  ))
-                  pkgs.nixd # nix language server
-                  pkgs.nixfmt-rfc-style # auto-formatting nix files through nixd
-                  pkgs.clang # To compile tree-sitter grammars
-                ]
-              }
-            '';
-          };
-        })
-      ];
-
-      home-manager.users.talexander =
-        { pkgs, ... }:
-        {
-          home.file.".config/emacs" = {
-            source = ./files/emacs;
-            recursive = true;
-          };
-        };
-
         environment.persistence."/state" = lib.mkIf (!config.me.buildingIso) {
           hideMounts = true;
           users.talexander = {
@@ -101,7 +84,82 @@ in
           };
         };
 
-      environment.variables.EDITOR = "${plainmacs}/bin/plainmacs";
+        environment.variables.EDITOR = "${pkgs.my_emacs}/bin/plainmacs";
       }
+      (lib.mkIf (config.me.graphical) {
+        nixpkgs.overlays = [
+          (final: prev: {
+            my_emacs = final.emacs29-pgtk;
+          })
         ];
+      })
+      (lib.mkIf (!config.me.graphical) {
+        nixpkgs.overlays = [
+          (final: prev: {
+            my_emacs = final.emacs-nox;
+          })
+        ];
+      })
+      (lib.mkIf (config.me.emacs_flavor == "full") {
+        nixpkgs.overlays = [
+          (final: prev: {
+            my_emacs = pkgs.buildEnv {
+              name = prev.my_emacs.name;
+              paths = with prev; [
+                my_emacs
+              ];
+              extraOutputsToInstall = [
+                "man"
+                "doc"
+                "info"
+              ];
+              buildInputs = [ final.makeWrapper ];
+              postBuild = ''
+                wrapProgram $out/bin/emacs --prefix PATH : ${
+                  lib.makeBinPath [
+                    (final.aspellWithDicts (
+                      dicts: with dicts; [
+                        en
+                        en-computers
+                      ]
+                    ))
+                    final.nixd # nix language server
+                    final.nixfmt-rfc-style # auto-formatting nix files through nixd
+                    final.clang # To compile tree-sitter grammars
+                    final.shellcheck
+                  ]
+                }
+              '';
+            };
+          })
+        ];
+
+        home-manager.users.talexander =
+          { pkgs, ... }:
+          {
+            home.file.".config/emacs" = {
+              source = ./files/emacs;
+              recursive = true;
+            };
+          };
+      })
+      (lib.mkIf (config.me.emacs_flavor == "plainmacs") {
+        nixpkgs.overlays = [
+          (final: prev: {
+            my_emacs = pkgs.buildEnv {
+              name = prev.my_emacs.name;
+              paths = with prev; [
+                my_emacs
+              ];
+              extraOutputsToInstall = [
+                "man"
+                "doc"
+                "info"
+              ];
+            };
+          })
+        ];
+      })
+    ]
+  );
 }