Man pages matching name cpanplus::dist::build::constants in section 3pm:

CPANPLUS::Dist::Build::Constants.3pm.en	debian 10 / libcpanplus-dist-build-perl
CPANPLUS::Dist::Build::Constants.3pm.en	debian 11 / libcpanplus-dist-build-perl
CPANPLUS::Dist::Build::Constants.3pm.en	debian 12 / libcpanplus-dist-build-perl