diff --git a/README.md b/README.md
index 198a2605..d13a9a26 100644
--- a/README.md
+++ b/README.md
@@ -28,9 +28,11 @@ Grab the build dependencies with:
                        python3-dev build-essential \
                        node-less node-source-map
 
-Install [install pip](https://pip.pypa.io/en/latest/installing/#get-pip), then install [Tox](http://tox.readthedocs.org/en/latest/).
+[Install pip](https://pip.pypa.io/en/latest/installing/#get-pip), then install [Tox](http://tox.readthedocs.org/en/latest/).
 (I actually recommend installing this in your home directory, but that's outside the scope of this document.)
 
+[Install Just](https://just.systems/man/en/), probaby via Cargo.
+
 Check out the repository:
 
     $ git checkout https://github.com/twm/yarrharr.git
diff --git a/justfile b/justfile
index a6b36722..de729f74 100644
--- a/justfile
+++ b/justfile
@@ -1,25 +1,29 @@
 # Copyright 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2022, 2023 Tom Most <twm@freecog.net>; GPLv3+
 
-static:
+set shell := ["bash", "-euc"]
+
+default:
+    just --list
+
+_static:
     tox -e static
 
-release: static
-    set -e
+release: _static
+    #!/usr/bin/env bash
+    set -exu -o pipefail
     git diff --quiet HEAD || exit 1
     tox -e release --notest
-    version=$$(grep -oP '(?<=__version__ = ")([^"]+)(?=")' yarrharr/__init__.py)
+    version=$(grep -oP '(?<=__version__ = ")([^"]+)(?=")' yarrharr/__init__.py)
     .tox/release/bin/python -m build
-    .tox/release/bin/python -m twine check "dist/yarrharr-$${version}.tar.gz" "dist/yarrharr-$${version}-py3-none-any.whl"
-    git tag "v$${version}"
+    .tox/release/bin/python -m twine check "dist/yarrharr-${version}.tar.gz" "dist/yarrharr-${version}-py3-none-any.whl"
+    git tag "v${version}"
 
-devserver: static
-    set -e
+devserver: _static
     tox -e run -- django-admin migrate
     tox -e run -- django-admin updatehtml
     YARRHARR_CONF='yarrharr/tests/*.ini' tox -e run -- django-admin runserver 127.0.0.1:8888
 
-realserver: static
-    set -e
+realserver: _static
     tox -e run -- django-admin migrate
     tox -e run -- django-admin collectstatic --noinput
     tox -e run -- yarrharr