I hacked into the builder\MyBuilder.pm file to get the same build result but with more effort.

That said I get test failures, although these look like problems with the tests given the expected version is hard-coded to 1.5.5.

t\01_basic.t ................ #
# Compress::Stream::Zstd Version 0.206
# ZSTD_VERSION_NUMBER            10507
# ZSTD_VERSION_STRING            1.5.7
# ZSTD_MAX_CLEVEL                22
# ZSTD_MIN_CLEVEL                -131072
#
t\01_basic.t ................ 1/?
t\01_basic.t ................ 1/?
#   Failed test at t\01_basic.t line 30.
#          got: '10507'
#     expected: '10505'

#   Failed test at t\01_basic.t line 31.
#          got: '1.5.7'
#     expected: '1.5.5'
# Looks like you failed 2 tests of 16.
t\01_basic.t ................ Dubious, test returned 2 (wstat 512, 0x2
+00)
[download]