diff --git a/content/posts/nixcon2023/demo-config/configuration.nix b/content/posts/nixcon2023/demo-config/configuration.nix
new file mode 100644
index 0000000..ce4ec65
--- /dev/null
+++ b/content/posts/nixcon2023/demo-config/configuration.nix
@@ -0,0 +1,9 @@
+{ pkgs, config, ... }: {
+  programs.fish.enable = true;
+
+  fileSystems."/" = {
+    device = "/dev/sda1";
+  };
+  boot.loader.grub.enable = false;
+  system.stateVersion = "23.05";
+}
diff --git a/content/posts/nixcon2023/index.md b/content/posts/nixcon2023/index.md
index 1fea700..b9049bd 100644
--- a/content/posts/nixcon2023/index.md
+++ b/content/posts/nixcon2023/index.md
@@ -1,9 +1,10 @@
 +++
 title = "NixCon 2023: Finding things in nixpkgs and NixOS source"
 path = "/nixcon2023"
-draft = true
+draft = false
 tags = ["nix", "nixcon"]
 date = "2023-09-09"
 +++
 
+Slides here: <https://jade.fyi/nixcon2023/slides/>
 
diff --git a/content/posts/nixcon2023/slides/.yarn/install-state.gz b/content/posts/nixcon2023/slides/.yarn/install-state.gz
index 9307623..a2595aa 100644
Binary files a/content/posts/nixcon2023/slides/.yarn/install-state.gz and b/content/posts/nixcon2023/slides/.yarn/install-state.gz differ
diff --git a/content/posts/nixcon2023/slides/dynamic-demo.mp4 b/content/posts/nixcon2023/slides/dynamic-demo.mp4
new file mode 100644
index 0000000..641d3bd
--- /dev/null
+++ b/content/posts/nixcon2023/slides/dynamic-demo.mp4
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:55f1cb458194635ee01acc93463beba3246ddbfa7c1a1aaa59f26eb28f210889
+size 1419413
diff --git a/content/posts/nixcon2023/slides/index.html b/content/posts/nixcon2023/slides/index.html
index 091b6bf..2b164b3 100644
--- a/content/posts/nixcon2023/slides/index.html
+++ b/content/posts/nixcon2023/slides/index.html
@@ -58,10 +58,11 @@
 <section data-markdown><textarea data-template>
 # the sources are for everyone
 
-* We do need to improve our documentation
+* We *do* need to improve our documentation
 * Nix is uniquely participatory: a *lot* of us write modules and packages, which means reading sources
 * Navigating the source is a bit of witchcraft, and there's a lot of it
 * With good tooling, the sources of the docs sometimes are faster than the docs
+  * We should have more interactive docs!
 </textarea>
 </section>
 
@@ -101,8 +102,12 @@ dev/nixpkgs » tokei -t nix .
 # Static analysis
 
 * Any method that takes 15 seconds or less and doesn't involve running any code
-* I am showing the fancy ways of doing it
-    * ripgrep is static analysis too; it's a good fallback
+* First way to try:
+  * Extremely fast
+  * Objective: "works most of the time"
+* I am showing the fancy ways of doing it here
+  * ripgrep is static analysis too
+  * Objective of fancy ways: faster and less stuff to sort through
 </textarea>
 </section>
 
@@ -118,8 +123,7 @@ Good for:
 Limitations:
 * does not eval everything
 * needs some setup per-project
-* completions are imperfect but they exist
-* not sure how to get goto definition to go past args for some things
+* imperfect go-to-definition
 </textarea>
 </section>
 
@@ -145,10 +149,10 @@ Install from nixpkgs and configure in your editor. Then:
 </textarea>
 </section>
 
-<section data-markdown><textarea data-template>
+<section class="video" data-markdown><textarea data-template>
 # demo (nixd)
 
-FIXME
+<video class="r-stretch" src="./nixd.mp4" controls>
 </textarea>
 </section>
 
@@ -158,11 +162,11 @@ FIXME
 * Very old and simple source code index format
 * Usually gets through abstraction by being too naive to get broken
 * Typically generated by simple parse-tree traversal
-* Wide editor support ([VSCode extension](https://marketplace.visualstudio.com/items?itemName=jaydenlin.ctags-support), built into vim/emacs)
+* Wide editor support ([VSCode extension](https://marketplace.visualstudio.com/items?itemName=jaydenlin.ctags-support); also built into vim/emacs)
 
 Sample:
 
-```
+```text
 boot.initrd.luks.reusePassphrases       nixos/modules/system/boot/luksroot.nix      533
 ```
 </textarea>
@@ -173,19 +177,21 @@ boot.initrd.luks.reusePassphrases       nixos/modules/system/boot/luksroot.nix
 # ctags on nix
 
 * `nix-doc tags .` in nixpkgs, then in vim you can `:tj fixedPoints`, `C-]`, etc.
-* [WIP ctags for NixOS options](https://github.com/NixOS/nixpkgs/pull/249243)
+* [WIP ctags for NixOS options (#249243)](https://github.com/NixOS/nixpkgs/pull/249243)
 </textarea>
 </section>
 
-<section data-markdown><textarea data-template>
+<section class="video" data-markdown><textarea data-template>
 # demo (ctags on nix)
 
-FIXME
+<video class="r-stretch" src="./nix-ctags.mp4" controls>
 </textarea>
 </section>
 
 <section data-markdown><textarea data-template>
 # summary (static analysis)
+
+First try language server, then ctags, then ripgrep.
 </textarea>
 </section>
 
@@ -264,6 +270,7 @@ null
 </textarea>
 </section>
 
+<!--
 <section data-markdown><textarea data-template>
 # `builtins.unsafeGetAttrPos`
 
@@ -282,6 +289,21 @@ s.nix"; line = 1193; }
 </script></code></pre>
 </textarea>
 </section>
+-->
+
+<section class="video" data-markdown><textarea data-template>
+<video class="r-stretch" src="./dynamic-demo.mp4" controls>
+</textarea>
+</section>
+
+<section data-markdown><textarea data-template>
+# bonus: using the debugger
+
+* pass `--debugger` to nix
+* use `builtins.break (value)` somewhere in the evaluation path
+* then use `unsafeGetAttrPos` and others to figure out the source of a value
+</textarea>
+</section>
 
 <section data-markdown><textarea data-template>
 # summary (dynamic analysis)
@@ -294,14 +316,19 @@ s.nix"; line = 1193; }
 * `builtins.doc` (nix-doc)
     * \+ concise output on functions
     * \- issues with wrappers
+</textarea>
+</section>
+
+<section data-markdown><textarea data-template>
+# summary (dynamic analysis)
 * `builtins.unsafeGetAttrPos`
-    * \+ can get you close to the source if other things fail due to abstraction
+    * \+ gets close even with abstraction
     * \- unergonomic args and return value for interactive use
 </textarea>
 </section>
 
 <section data-markdown><textarea data-template>
-# NixOS ctags ([PR](https://github.com/NixOS/nixpkgs/pull/249243))
+# NixOS ctags ([PR #249243](https://github.com/NixOS/nixpkgs/pull/249243))
 
 With the PR checked out:
 
@@ -313,10 +340,10 @@ $ nix build -f nixos/release.nix optionsCtags -o opts-tags
 Then add `opts-tags` to ctags search path (`:set tags+=opts-tags` in vim).
 </section>
 
-<section data-markdown><textarea data-template>
+<section class="video" data-markdown><textarea data-template>
 # NixOS ctags (demo)
 
-FIXME
+<video class="r-stretch" src="./nixos-ctags.mp4" controls>
 </textarea>
 </section>
 
@@ -326,14 +353,14 @@ FIXME
 Getting the configuration into the repl:
 
 * Non-flakes: `nix repl -I nixos-config=/path/to/configuration.nix -f &lt;nixpkgs/nixos&gt;`
-* Flakes: `nix repl`, `:lf .`, `nixosConfigurations.xx.{....}`
+* Flakes: `nix repl` then `:lf .` then `nixosConfigurations.xx.{....}`
 </textarea>
 </section>
 
-<section data-markdown><textarea data-template>
+<section class="video" data-markdown><textarea data-template>
 # NixOS in the repl (demo)
 
-FIXME
+<video class="r-stretch" src="./nixos-repl.mp4" controls>
 
 <!--
 nix-repl> config.documentation.man.generateCaches
@@ -361,6 +388,22 @@ lue = true; } ]
 </section>
 
 
+<section data-markdown><textarea data-template>
+# questions?
+
+slides: https://jade.fyi/nixcon2023
+
+masto: @leftpaddotpy\@hachyderm.io
+
+email: jade at jade dot fyi
+
+code: https://github.com/LF-
+
+github sponsors: https://github.com/sponsors/LF-
+</textarea>
+</section>
+
+
         <script type="module" src="main.js"></script>
     </body>
 </html>
diff --git a/content/posts/nixcon2023/slides/main.js b/content/posts/nixcon2023/slides/main.js
index 2c81db9..e9a4aa5 100644
--- a/content/posts/nixcon2023/slides/main.js
+++ b/content/posts/nixcon2023/slides/main.js
@@ -11,4 +11,7 @@ Reveal.initialize({
     transitionSpeed: "fast",
     transition: "none",
     slideNumber: true,
+
+    margin: 0.04,
+    disableLayout: true,
 });
diff --git a/content/posts/nixcon2023/slides/nix-ctags.mp4 b/content/posts/nixcon2023/slides/nix-ctags.mp4
new file mode 100644
index 0000000..60a2eae
--- /dev/null
+++ b/content/posts/nixcon2023/slides/nix-ctags.mp4
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5e1b340b4499a892019adace12d3ac8ef5ce88df1d718c7bdd986ba808776591
+size 1727949
diff --git a/content/posts/nixcon2023/slides/nixd.mp4 b/content/posts/nixcon2023/slides/nixd.mp4
new file mode 100644
index 0000000..faed40f
--- /dev/null
+++ b/content/posts/nixcon2023/slides/nixd.mp4
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5693abfc18f2cf1e984feebbb6e62c0a051b0ea6c580a18dbb44ec9b21b13eac
+size 818732
diff --git a/content/posts/nixcon2023/slides/nixos-ctags.mp4 b/content/posts/nixcon2023/slides/nixos-ctags.mp4
new file mode 100644
index 0000000..244470d
--- /dev/null
+++ b/content/posts/nixcon2023/slides/nixos-ctags.mp4
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ba82574fa36bb9348c5f144a81b87127c7305c63ab6bf9a6a9b270b84ef77f8f
+size 576676
diff --git a/content/posts/nixcon2023/slides/nixos-repl.mp4 b/content/posts/nixcon2023/slides/nixos-repl.mp4
new file mode 100644
index 0000000..4c7ccc4
--- /dev/null
+++ b/content/posts/nixcon2023/slides/nixos-repl.mp4
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:762c43a6fa9bf8f4e4f998eb952755e40d93b9d53c539944b9f2035873c4f7da
+size 1422862
diff --git a/content/posts/nixcon2023/slides/styles.css b/content/posts/nixcon2023/slides/styles.css
index 27f7f29..4364fb9 100644
--- a/content/posts/nixcon2023/slides/styles.css
+++ b/content/posts/nixcon2023/slides/styles.css
@@ -1,3 +1,14 @@
+.slides {
+  display: flex;
+  /*! flex: max-content; */
+  align-items: center;
+  justify-content: center;
+}
+
+.slides section:not(.video) {
+  max-width: var(--slide-width);
+}
+
 :root {
     --r-heading-text-transform: none !important;
     --r-background-color: #190022 !important;