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";