Missing man pages with CMake build in 1.4.0

Trying to run make install with the CMake build results in the following error:

Install the project...
-- Install configuration: "Release"
-- Installing: $PREFIX/share/FLAC/cmake/targets.cmake
-- Installing: $PREFIX/share/FLAC/cmake/targets-release.cmake
-- Installing: $PREFIX/share/FLAC/cmake/flac-config.cmake
-- Installing: $PREFIX/share/FLAC/cmake/flac-config-version.cmake
-- Up-to-date: $PREFIX/share/FLAC/cmake/flac-config.cmake
-- Up-to-date: $PREFIX/share/FLAC/cmake/flac-config-version.cmake
-- Installing: $PREFIX/include/FLAC/all.h
-- Installing: $PREFIX/include/FLAC/assert.h
-- Installing: $PREFIX/include/FLAC/callback.h
-- Installing: $PREFIX/include/FLAC/export.h
-- Installing: $PREFIX/include/FLAC/format.h
-- Installing: $PREFIX/include/FLAC/metadata.h
-- Installing: $PREFIX/include/FLAC/ordinals.h
-- Installing: $PREFIX/include/FLAC/stream_decoder.h
-- Installing: $PREFIX/include/FLAC/stream_encoder.h
-- Installing: $PREFIX/include/FLAC++/all.h
-- Installing: $PREFIX/include/FLAC++/decoder.h
-- Installing: $PREFIX/include/FLAC++/encoder.h
-- Installing: $PREFIX/include/FLAC++/export.h
-- Installing: $PREFIX/include/FLAC++/metadata.h
CMake Error at cmake_install.cmake:107 (file):
  file INSTALL cannot find
  "/home/conda/feedstock_root/build_artifacts/libflac_1662749525203/work/man/flac.1":
  No such file or directory.

See https://api.travis-ci.com/v3/job/582395654/log.txt for a full build log.