if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; elif [ -f .attrs.sh ]; then . .attrs.sh; fi
source "$stdenv/setup"

echo "exporting \`$url' (revision $rev) into \`$out'"

# Perform a lightweight checkout so that we don't end up importing
# all the repository's history.
XDG_CACHE_HOME="$TMPDIR" BRZ_LOG=/dev/null bzr -Ossl.cert_reqs=none export -r "$rev" --format=dir "$out" "$url"