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='2018-10-30 11:03:48 +0200'>2018-10-30</span></td><td><a href='/guix/commit/gnu/packages/javascript.scm?id=f8ddf719f3b4005b0cff0d36a82d23c07f2c2913'>gnu: mujs: Install shared library.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2018-10-30 11:03:06 +0200'>2018-10-30</span></td><td><a href='/guix/commit/gnu/packages/javascript.scm?id=1371e2250ad04d658a6d85b3ded1c607a4090f2d'>gnu: mujs: Update to 1.0.5.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2018-08-30 04:42:54 +0200'>2018-08-30</span></td><td><a href='/guix/commit/gnu/packages/javascript.scm?id=9986316618c471a9a100d1b317a342aee8d5e6df'>gnu: mujs: Update to 1.0.4.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-05-17 01:00:50 -0400'>2018-05-17</span></td><td><a href='/guix/commit/gnu/packages/javascript.scm?id=539bf8f2c071b53834829259bb3fabf0390c5dc6'>Merge branch 'master' into core-updates</a></td><td>Mark H Weaver</td></tr>
<tr><td><span title='2018-05-11 10:35:41 +0200'>2018-05-11</span></td><td><a href='/guix/commit/gnu/packages/javascript.scm?id=11b43f996e08fa4789fb245bfd516071cbbf37b2'>gnu: Add js-filesaver.</a><span class='msg-avail'>...</span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2018-04-10 00:42:22 -0400'>2018-04-10</span></td><td><a href='/guix/commit/gnu/packages/javascript.scm?id=f89aa1521af69b0e1a1350c2380579788b0f8945'>Merge branch 'master' into core-updates</a></td><td>Mark H Weaver</td></tr>
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<tr><td><span title='2018-03-27 21:35:41 -0400'>2018-03-27</span></td><td><a href='/guix/commit/gnu/packages/javascript.scm?id=e3cfef22c4a18cacf33356a70788503fd689b96d'>gnu: Use invoke and return #t from all builders.</a><span class='msg-avail'>...</span></td><td>Mark H Weaver</td></tr>
<tr><td><span title='2017-12-27 21:04:37 +0100'>2017-12-27</span></td><td><a href='/guix/commit/gnu/packages/javascript.scm?id=94b779b6a4d0bbd0693e293d2f6f38afa6e8a6c3'>gnu: mujs: Update to 1.0.2.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>