MissingPackageRevision: version 0.19.1: ">" operator used without package revision: DEPEND=">dev-lang/crystal-0.11.1"; did you mean either of: ('>dev-lang/crystal-0.11.1-r0', '>dev-lang/crystal-0.11.1-r9999')?
  MissingPackageRevision: version 0.19.1: ">" operator used without package revision: RDEPEND=">dev-lang/crystal-0.11.1"; did you mean either of: ('>dev-lang/crystal-0.11.1-r0', '>dev-lang/crystal-0.11.1-r9999')?