diff --git a/third_party/cgit/default.nix b/third_party/cgit/default.nix
index b566e41c3..e108bb1d7 100644
--- a/third_party/cgit/default.nix
+++ b/third_party/cgit/default.nix
@@ -27,6 +27,7 @@ stdenv.mkDerivation rec {
     rm -rf git # remove submodule dir ...
     cp -r --no-preserve=ownership,mode ${depot.third_party.git.src} git
     makeFlagsArray+=(prefix="$out" CGIT_SCRIPT_PATH="$out/cgit/")
+    cat tvl-extra.css >> cgit.css
   '';
 
   meta = {
diff --git a/third_party/cgit/tvl-extra.css b/third_party/cgit/tvl-extra.css
new file mode 100644
index 000000000..f174b2c03
--- /dev/null
+++ b/third_party/cgit/tvl-extra.css
@@ -0,0 +1,4 @@
+/* limit the width of /about/** to help readability */
+.content #summary {
+  max-width: 800 px;
+}