message: CI: fix alpine
  introduced an error.
diff: @@ -117,7 +117,7 @@ x86_64-alpine-gcc:
  - python3 drake -j $(nproc) //check
  - python3 drake -j $(nproc) //install
  - TARBALL="$BUILD_DIR/elle-x86_64-alpine-gcc-$DESC.tbz"
  - - tar $TARFLAGS -cjf "$TARBALL -C "$INSTALL_DIR" . --show-transformed-names --transform "s,^\\./,elle-$DESC/,"
  + - tar $TARFLAGS -cjf "$TARBALL" -C "$INSTALL_DIR" . --show-transformed-names --transform "s,^\\./,elle-$DESC/,"
  - scp "$TARBALL" buildslave@packages.infinit.sh:tmp
  - rm "$TARBALL"
  - cd "$SOURCE_DIR"
  