fix some perl-in-space problems #385

Job	Run time
perl (1, 5.39)	1m 30s
perl (1, ALIEN_BUILD_LIVE_TEST=1, 5.38-alpine3.16)	1m 42s
perl (1, ALIEN_BUILD_LIVE_TEST=1, 5.38-bionic)	1m 44s
perl (1, ALIEN_BUILD_LIVE_TEST=1, 5.38-fedora36)	2m 9s
perl (0, ALIEN_BUILD_LIVE_TEST=0, 5.38-bullseye)	1m 25s
perl (1, ALIEN_BUILD_LIVE_TEST=1, 5.38-bullseye)	2m 21s
perl (1, ALIEN_DOWNLOAD_RULE=warn, 5.38)	1m 37s
perl (1, ALIEN_DOWNLOAD_RULE=digest, 5.38)	1m 37s
perl (1, ALIEN_DOWNLOAD_RULE=encrypt, 5.38)	1m 37s
perl (1, ALIEN_DOWNLOAD_RULE=digest_or_encrypt, 5.38)	1m 34s
perl (1, ALIEN_DOWNLOAD_RULE=digest_and_encrypt, 5.38)	1m 37s
perl (1, 5.38)	1m 37s
perl (1, 5.36)	1m 41s
perl (1, 5.34)	1m 41s
perl (1, 5.32)	1m 40s
perl (1, 5.30)	1m 44s
perl (1, 5.28)	1m 32s
perl (1, 5.26)	1m 33s
perl (1, 5.24)	1m 35s
perl (1, 5.22)	1m 34s
perl (1, 5.20)	1m 30s
perl (0, 5.18)	1m 18s
perl (0, 5.16)	1m 20s
perl (0, 5.14)	1m 22s
perl (0, 5.12)	1m 24s
perl (0, 5.10.1)	58s
perl (0, 5.10.0)	1m 4s
perl (0, 5.8.8)	1m 0s
perl (0, 5.8.4)	57s
	44m 23s

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