Do not record the configuration and build time so that builds can be
reproduced bit-for-bit.

--- perl-5.22.0/Configure	1970-01-01 01:00:00.000000000 +0100
+++ perl-5.22.0/Configure	2015-12-13 00:14:43.148165080 +0100
@@ -3834,6 +3817,7 @@ esac
 
 : who configured the system
 cf_time=`LC_ALL=C; LANGUAGE=C; export LC_ALL; export LANGUAGE; $date 2>&1`
+cf_time='Thu Jan  1 00:00:01 UTC 1970'
 case "$cf_by" in
 "")
 	cf_by=`(logname) 2>/dev/null`

--- perl-5.22.0/perl.c	2015-12-13 00:25:30.269156627 +0100
+++ perl-5.22.0/perl.c	2015-12-13 00:25:38.265218175 +0100
@@ -1795,7 +1795,7 @@ S_Internals_V(pTHX_ CV *cv)
     PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
 			      sizeof(non_bincompat_options) - 1, SVs_TEMP));
 
-#ifdef __DATE__
+#if 0
 #  ifdef __TIME__
     PUSHs(Perl_newSVpvn_flags(aTHX_
 			      STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),

alue='switch'/></form></td></tr>
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<tr><td><span title='2020-03-09 23:46:36 +0100'>2020-03-09</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=0e42a1643ea5a0cc4ddb81687c608ba407fdcdbb'>tests: docker-system: Increase memory requirement.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-11-09 23:04:14 +0100'>2019-11-09</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=f0034427f50be1bcab137d9877c3586e4be4d83e'>tests: Update references to the now-deprecated 'guile-json' variable.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-08-27 12:20:44 +0200'>2019-08-27</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=7979a287f8eb84cbbfa44629951572408939a756'>pack: Create /tmp in Docker images.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-04 18:05:02 +0200'>2019-07-04</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=b9fcf0c82a14df48c7c6f36a08dbdcd3184fcbf8'>pack: 'docker' backend records the profile's search paths.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-06-07 09:57:19 +0200'>2019-06-07</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=a0f352b30f4869a7af7017b8a5011ac7602dd115'>pack: Add '--entry-point'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-05-15 16:36:21 +0200'>2019-05-15</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=247649d42e60b718f3f46b2bcf72d19bf799d503'>vm: 'system-docker-image' provides an entry point.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-18 22:24:14 +0100'>2019-01-18</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=69e47686c9a8a2b5c4ee33e5b14da657de3d7ca0'>tests: docker: Use "package" instead of "dummy-package".</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-15 12:16:46 +0100'>2019-01-15</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=49ec5d88c5770ae49b45849cb691c8921ecf4ca7'>tests: docker: Run a guest guile inside the docker container.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-11 12:14:37 +0100'>2019-01-11</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=babfd9447df08a809622238b4830eb046dab2ba6'>tests: Nitpick on Docker test.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-10 05:15:41 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=dc4b4a38fa2577d4dd01f80b4bc8c9255304e576'>tests: docker: Fix test.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2019-01-10 03:44:20 +0100'>2019-01-10</span></td><td><a href='/guix/commit/gnu/tests/docker.scm?id=7d8a4eeacc534c8742e0b22d855aa73e5ab66b7f'>tests: Add Docker system test.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>