diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..64bdc20
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/build
+/src/*/*
+!/src/*/debian
diff --git a/README.rst b/README.rst
new file mode 100644
index 0000000..89cefc1
--- /dev/null
+++ b/README.rst
@@ -0,0 +1,3 @@
+Run `./update.sh <rust-crate-name>` and follow its instructions.
+
+(The above applies even for new Rust Debian packages.)
diff --git a/release.sh b/release.sh
new file mode 100755
index 0000000..62ebd9c
--- /dev/null
+++ b/release.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+. ./vars.sh.frag
+
+git diff -q -- "$PKGDIR_REL" || \
+abort 1 "Please git-add your changes to $PKGDIR_REL before running"
+
+( cd "$PKGDIR"
+sed -i -e s/UNRELEASED-FIXME-AUTOGENERATED-DEBCARGO/UNRELEASED/ debian/changelog
+dch -r -D unstable ""
+git add debian/changelog
+)
+
+rm -rf "$BUILDDIR"
+$DEBCARGO package --config "$PKGCFG" --directory "$BUILDDIR" --changelog-ready "$PKG"
+
+git diff -q -- "$PKGDIR_REL" || \
+abort 1 "cannot release, update resulted in git diffs to $PKGDIR_REL"
+
+git commit -m "Update package $PKG"
+
+( cd "$BUILDDIR" && dpkg-buildpackage -d -S --no-sign )
diff --git a/update.sh b/update.sh
new file mode 100755
index 0000000..9c15498
--- /dev/null
+++ b/update.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+. ./vars.sh.frag
+
+if [ ! -d "$PKGDIR/debian" ]; then
+	mkdir -p "$PKGDIR/debian"
+	sed -e 's/^#overlay =/overlay =/' -e '/^#/d' "$DEBCARGO_GIT/debcargo.toml.example" > "$PKGCFG"
+	touch "$PKGDIR/debian/copyright"
+	git add "$PKGDIR"
+fi
+
+rm -rf "$BUILDDIR" && mkdir -p "$(dirname $BUILDDIR)"
+$DEBCARGO package --config "$PKGCFG" --directory "$BUILDDIR" "$PKG"
+
+if ! git diff -q -- "$PKGDIR_REL"; then
+	read -p "Update wrote some changes to $PKGDIR_REL, press enter to git diff..." x
+	git diff -- "$PKGDIR_REL"
+fi
+
+cat >&2 <<eof
+Automatic update of $PKG finished; now it's your turn to manually review it.
+
+Deal with any FIXMEs mentioned above, by editing the corresponding source files
+in $PKGDIR_REL (and NOT the build directory as mentioned). When done, git-add
+your changes and re-run this command (\`./update.sh $*\`).
+
+Check that your fixes actually get rid of the FIXMEs. Of course, you may ignore
+FIXMEs listed in hint files, indicated by (.), assuming you actually fixed the
+issues in the corresponding non-hint files. (We have no way to auto-detect this
+so you have to be honest!)
+
+If satisfied with the output, run \`./release.sh $*\` to finalise your changes
+in the changelog and build a release-ready .dsc in build/. Assuming it runs
+successfully, you may \`dput\` the results afterwards.
+eof
diff --git a/vars.sh.frag b/vars.sh.frag
new file mode 100644
index 0000000..d912b59
--- /dev/null
+++ b/vars.sh.frag
@@ -0,0 +1,13 @@
+set -e
+
+DEBCARGO_GIT=${DEBCARGO_GIT:-$PWD/../debcargo}
+DEBCARGO=${DEBCARGO:-$DEBCARGO_GIT/target/debug/debcargo}
+PKG="$1"
+
+PKGNAME=$($DEBCARGO deb-src-name "$PKG")
+PKGDIR_REL="src/$PKGNAME"
+PKGDIR="$PWD/$PKGDIR_REL"
+BUILDDIR="$PWD/build/$PKGNAME"
+PKGCFG="$PKGDIR/debian/debcargo.toml"
+
+abort() { local x=$1; shift; echo >&2 "$0: abort: $@"; exit "$x"; }