build2 build failed

error: checksum mismatch for libbutl 0.17.0
  info: pkg:cppget.org/alpha has b05a9a11feacdab17561c663c3927aa18e689793db3bdbf2e8db1e2a3aef4efb
  info: fetched archive has f6206392234ea9e7f43a59dbd3213e47ea531aed3cc843d69576b88903bad542
  info: consider re-fetching package list and trying again
  info: if problem persists, consider reporting this to the repository maintainer