diff --git a/README.md b/README.md
index d927bc8..807f84d 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,11 @@ To import assignments, run `tag-albums import-yaml` inside the container, e.g. `
 ## Deploying in a FreeBSD jail
 
 ```sh
-pkg install python311 py311-uv git       # or any Python >= 3.11
+pkg install python313 py313-sqlite3 py313-uv git rust   # any Python >= 3.11; sqlite3 is a separate package
+# uv compiles pydantic-core (Rust) and a few C extensions from source, since
+# FreeBSD has no prebuilt wheels. The jail needs the base system's development
+# files for that (e.g. /usr/lib/Scrt1.o, crti.o, libc): on a pkgbase jail,
+# install the FreeBSD-*-dev packages (or the devel set) from the FreeBSD-base repo.
 pw useradd tagalbums -d /nonexistent -s /usr/sbin/nologin
 git clone <repo> /usr/local/tag-albums && cd /usr/local/tag-albums && uv sync --no-dev
 install -d -o tagalbums /var/db/tag_albums