Building sublibraries in parallel can lead to race conditions on the libseq
and lipord targets.

--- MUMPS_5.0.0/Makefile.orig	2015-06-15 10:08:54.523146562 -0500
+++ MUMPS_5.0.0/Makefile	2015-06-15 10:19:44.074367512 -0500
@@ -11,6 +11,7 @@
 	sexamples dexamples cexamples zexamples \
 	mumps_lib requiredobj libseqneeded clean
 
+.NOTPARALLEL:
 alllib:		c z s d
 all:		cexamples zexamples sexamples dexamples
 
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<tr><td><span title='2018-10-15 10:31:24 +0200'>2018-10-15</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=f1a9c6e581e3b90713d11801dbab9a611f6fe63a'>gnu: lsof: Fix builds on glibc 2.28.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-07-12 17:21:16 +0200'>2018-07-12</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=6f6f9ef0ce6c452d7a976e78281e9d25f8dcfb54'>gnu: lsof: Return #t from all phases.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-07-12 17:21:16 +0200'>2018-07-12</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=b9ffa82b968830e4da5f6c55f3cfd6591bbf6349'>gnu: lsof: Update to 4.91.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-02-19 06:00:30 +0100'>2018-02-19</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=16cb3b8fe00500fc5d434cd761afbfb594cfd4c4'>gnu: lsof: Run tests.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-02-19 06:00:30 +0100'>2018-02-19</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=c2799070caf305a4c88e9a77fc36632069811f56'>gnu: lsof: Remove build timestamp.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-02-19 06:00:29 +0100'>2018-02-19</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=b7fd3e96c7b6ccf7f6f9949b5a263753b4fee50e'>gnu: lsof: Update phase style.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-02-19 06:00:29 +0100'>2018-02-19</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=57774ae150dad563767d6d573e206b45fce4683c'>gnu: lsof: Make perl a native input.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-02-19 06:00:28 +0100'>2018-02-19</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=cb443e55dcfdce628c0f4f81269adad9fed414d2'>gnu: lsof: Factorise source URIs.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-02-19 06:00:27 +0100'>2018-02-19</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=5ae76e8f167bf4d721339aeace37fdb48b3b69b2'>gnu: lsof: Replace dead mirror.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-04-29 23:41:06 +0300'>2017-04-29</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=e18e17ea4ea9172402e782d69477bf15c1c25776'>gnu: lsof: Update to 4.89.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-04-29 23:41:05 +0300'>2017-04-29</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=4ae3549f7cd57ecd09ebd957ec512dd530dc83d0'>gnu: lsof: Shorten 'install phase.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-04-29 23:25:22 +0300'>2017-04-29</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=b6ea329a32f1d1da17ff72affab2e1fe16aff51f'>gnu: lsof: Use 'modify-phases' syntax.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-04-29 23:20:47 +0300'>2017-04-29</span></td><td><a href='/guix/commit/gnu/packages/lsof.scm?id=d5fa9fd1fe90ad024ec5a14c21c95407e1f78441'>gnu: lsof: Add to mirror list.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>