diff --git a/flake.nix b/flake.nix
index 909af02..d1828f0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,7 +8,6 @@
       pkgs = import nixpkgs { inherit system; };
 
       inherit (pkgs) lib;
-      inherit (nixpkgs.lib) makeOverridable;
       inherit (pkgs.stdenvNoCC) mkDerivation;
 
       interStaticFonts = mkDerivation {
@@ -27,11 +26,6 @@
         '';
       };
 
-      fontPaths = lib.concatStringsSep ":" [
-        "${pkgs.inconsolata}/share/fonts/truetype/inconsolata"
-        "${interStaticFonts}/share/fonts/truetype"
-      ];
-
       shared-assets = mkDerivation {
         name = "talks-shared-assets";
         src = ./src;
@@ -51,8 +45,14 @@
         (python310.withPackages (p: with p; [ rst2pdf ]))
       ];
 
-      mkTalk = makeOverridable (
+      mkTalk = lib.makeOverridable (
         { name, src }:
+        let
+          fontPaths = lib.concatStringsSep ":" [
+            "${pkgs.inconsolata}/share/fonts/truetype/inconsolata"
+            "${interStaticFonts}/share/fonts/truetype"
+          ];
+        in
         mkDerivation {
           inherit name shared-assets src;
 
@@ -82,7 +82,7 @@
             runHook preBuild
 
             mkdir $out
-            cp slides.pdf $out
+            cp *.pdf $out
 
             runHook postBuild
           '';