This is an Intel Mac, 10.15.7 with Perl 5.34.0, trying to install Alien::Build 2.45. A few other subsequent tests fail but I assume for now they are related. At a glance it looks like it's not quoting the path. Sorry I'm in the middle of something and don't have time to do a better report; just putting this here to revisit in a few days.
t/alien_build_plugin_build_copy.t .................... 1/? # Failed test 'builds okay'
# at t/alien_build_plugin_build_copy.t line 33.
# Alien::Build> single file, assuming archive
# Alien::Build::Auto::Zvtb0::Alienfile> bin=/Users/dorian/Library/Application Support/.cpan/build/Alien-Build-2.45-2/.tmp/zvXKI00tbN/root/build_NGA1/bin/mycommand
# Alien::Build::CommandSequence> + cp -pPR * /Users/dorian/Library/Application Support/.cpan/build/Alien-Build-2.45-2/.tmp/zvXKI00tbN/stage
# usage: cp [-R [-H | -L | -P]] [-fi | -n] [-apvXc] source_file target_file
# cp [-R [-H | -L | -P]] [-fi | -n] [-apvXc] source_file ... target_directory
# build threw exception: external command failed at /Users/dorian/Library/Application Support/.cpan/build/Alien-Build-2.45-2/blib/lib/Alien/Build/CommandSequence.pm line 88.
# Failed test 'file /Users/dorian/Library/Application Support/.cpan/build/Alien-Build-2.45-2/.tmp/zvXKI00tbN/stage/bin/mycommand exists'
# at t/alien_build_plugin_build_copy.t line 38.
# Failed test 'file /Users/dorian/Library/Application Support/.cpan/build/Alien-Build-2.45-2/.tmp/zvXKI00tbN/stage/bin/mycommand is executable'
# at t/alien_build_plugin_build_copy.t line 39.
# Failed test 'file /Users/dorian/Library/Application Support/.cpan/build/Alien-Build-2.45-2/.tmp/zvXKI00tbN/stage/include/foo.h exists'
# at t/alien_build_plugin_build_copy.t line 43.
# Failed test 'basic'
# at t/alien_build_plugin_build_copy.t line 51.
t/alien_build_plugin_build_copy.t .................... Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/1 subtests
This is an Intel Mac, 10.15.7 with Perl 5.34.0, trying to install Alien::Build 2.45. A few other subsequent tests fail but I assume for now they are related. At a glance it looks like it's not quoting the path. Sorry I'm in the middle of something and don't have time to do a better report; just putting this here to revisit in a few days.