diff --git a/advice.el b/advice.el
index 82f2d96..675b0fc 100644
--- a/advice.el
+++ b/advice.el
@@ -7,15 +7,22 @@
 ;;; have a properly configured user home and environment.
 (setq package-check-signature nil)
 
+(defun nix-straight-inhibit-kill-emacs (arg)
+  (message "[nix-doom-emacs] Inhibiting (kill-emacs)"))
+
 (advice-add 'nix-straight-get-used-packages
-            :before (lambda (&rest r)
+            :around (lambda (orig-fn &rest r)
                       (message "[nix-doom-emacs] Advising doom installer to gather packages to install...")
                       (advice-add 'doom-autoloads-reload
                                   :override (lambda (&optional file force-p)
                                               (message "[nix-doom-emacs] Skipping generating autoloads...")))
                       (advice-add 'doom--print
                                   :override (lambda (output)
-                                            (message output)))))
+                                              (message output)))
+                      (advice-add 'kill-emacs
+                                  :override #'nix-straight-inhibit-kill-emacs)
+                      (apply orig-fn r)
+                      (advice-remove 'kill-emacs 'nix-straight-inhibit-kill-emacs)))
 
 (advice-add 'y-or-n-p
             :override (lambda (q)
diff --git a/default.nix b/default.nix
index bb6e1d7..4048a21 100644
--- a/default.nix
+++ b/default.nix
@@ -49,6 +49,7 @@
 , runCommand
 , fetchFromGitHub
 , substituteAll
+, writeShellScript
 , writeShellScriptBin
 , writeTextDir }:
 
@@ -171,11 +172,25 @@ let
   in (emacsPackages.emacsWithPackages (epkgs: [
     load-config-from-site
   ]));
+
+  build-summary = writeShellScript "build-summary" ''
+      BOLD=\\033[1m
+      GREEN=\\033[32m
+      RESET=\\033[0m
+
+      printf "\n''${GREEN}Successfully built nix-doom-emacs!''${RESET}\n"
+      printf "''${BOLD}  ==> doom-emacs is installed to ${doom-emacs}''${RESET}\n"
+      printf "''${BOLD}  ==> private configuration is installed to ${doomDir}''${RESET}\n"
+      printf "''${BOLD}  ==> Dependencies are installed to ${doomLocal}''${RESET}\n"
+  '';
 in
 emacs.overrideAttrs (esuper:
   let cmd = ''
       for prog in $out/bin/*; do
-        wrapProgram $out/bin/$(basename $prog) --set DOOMDIR ${doomDir}
+        wrapProgram $out/bin/$(basename $prog) \
+                    --set DOOMDIR ${doomDir} \
+                    --set __DEBUG_doom_emacs_DIR ${doom-emacs} \
+                    --set __DEBUG_doomLocal_DIR ${doomLocal}
       done
       # emacsWithPackages assumes share/emacs/site-lisp/subdirs.el
       # exists, but doesn't pass it along.  When home-manager calls
@@ -184,6 +199,7 @@ emacs.overrideAttrs (esuper:
       # https://github.com/NixOS/nixpkgs/issues/66706
       rm -rf $out/share
       ln -s ${esuper.emacs}/share $out
+      ${build-summary}
     '';
   in
     if esuper ? buildCommand then
diff --git a/nix/sources.json b/nix/sources.json
index 472081c..e2c7835 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -167,6 +167,18 @@
         "url": "https://github.com/arnested/php-extras/archive/d410c5af663c30c01d461ac476d1cbfbacb49367.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
+    "reveal.js": {
+        "branch": "master",
+        "description": "The HTML Presentation Framework",
+        "homepage": "https://revealjs.com",
+        "owner": "hakimel",
+        "repo": "reveal.js",
+        "rev": "15815efe05ca69c35ce66cfdbf93316e1db66ecb",
+        "sha256": "1g3h710rhpyq4vnh6rgyay2dyjpw4rw99p062yhwhgrjkgjyzrc2",
+        "type": "tarball",
+        "url": "https://github.com/hakimel/reveal.js/archive/15815efe05ca69c35ce66cfdbf93316e1db66ecb.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
     "rotate-text.el": {
         "branch": "master",
         "description": "Emacs: cycle through words, symbols and patterns",
diff --git a/overrides.nix b/overrides.nix
index ccae250..e59f414 100644
--- a/overrides.nix
+++ b/overrides.nix
@@ -71,6 +71,18 @@ self: super: {
     pname = "php-extras";
   };
 
+  revealjs = self.straightBuild {
+    pname = "reveal.js";
+    ename = "revealjs";
+
+    installPhase = ''
+      LISPDIR=$out/share/emacs/site-lisp
+      install -d $LISPDIR
+
+      cp -r * $LISPDIR
+    '';
+  };
+
   rotate-text = self.straightBuild {
     pname = "rotate-text.el";
     ename = "rotate-text";