Taken from https://bug1339931.bmoattachments.org/attachment.cgi?id=8837771.

# HG changeset patch
# Parent 4732a0e5d22bc7e5c1f1ace7a182d537d9cc2c6a
Add major version to shell and js-config filenames.
Author: Rico Tzschichholz <ricotz@ubuntu.com>
Forwarded: no
Last-Update: 2014-10-29

---
diff --git a/js/src/configure b/js/src/configure
--- a/js/src/configure
+++ b/js/src/configure
@@ -1696,8 +1696,13 @@
 MOZJS_PATCH_VERSION=`echo $MOZILLA_VERSION | sed "s|^[0-9]*\.[0-9]*[^0-9]*||"`
 IS_ALPHA=`echo $MOZILLA_VERSION | grep '[ab]'`
 
+if test -n "$JS_STANDALONE"; then
+JS_SHELL_NAME=js$MOZJS_MAJOR_VERSION
+JS_CONFIG_NAME=js$MOZJS_MAJOR_VERSION-config
+else
 JS_SHELL_NAME=js
 JS_CONFIG_NAME=js-config
+fi
 
 
 if test -n "$IS_ALPHA"; then

diff --git a/js/src/configure.in b/js/src/configure.in
--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -234,16 +234,13 @@ MOZJS_MINOR_VERSION=`echo $MOZILLA_VERSI
 MOZJS_PATCH_VERSION=`echo $MOZILLA_VERSION | sed "s|^[0-9]*\.[0-9]*[^0-9]*||"`
 IS_ALPHA=`echo $MOZILLA_VERSION | grep '[ab]'`
 
-dnl XXX in a temporary bid to avoid developer anger at renaming files
-dnl XXX before "js" symlinks exist, don't change names.
-dnl
-dnl if test -n "$JS_STANDALONE"; then
-dnl JS_SHELL_NAME=js$MOZJS_MAJOR_VERSION
-dnl JS_CONFIG_NAME=js$MOZJS_MAJOR_VERSION-config
-dnl else
+if test -n "$JS_STANDALONE"; then
+JS_SHELL_NAME=js$MOZJS_MAJOR_VERSION
+JS_CONFIG_NAME=js$MOZJS_MAJOR_VERSION-config
+else
 JS_SHELL_NAME=js
 JS_CONFIG_NAME=js-config
-dnl fi
+fi
 
 changequote([,])
 if test -n "$IS_ALPHA"; then

diff -r 80a9e64d75f5 js/src/Makefile.in
--- a/js/src/Makefile.in        Wed Jun 25 15:11:42 2014 +0200
+++ b/js/src/Makefile.in        Sat Jul 05 14:08:38 2014 +0200
@@ -273,6 +273,9 @@
 SCRIPTS = $(JS_CONFIG_NAME)
 SDK_BINARY = $(JS_CONFIG_NAME)
 
+$(JS_CONFIG_NAME): js-config
+	cp $^ $@
+
 $(JS_LIBRARY_NAME).pc: js.pc
 	cp $^ $@
 
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<div class='path'>path: <a href='/guix/log/?id=f58764d8ed633a8ad1c9f2578be7bbde36ed7ce7'>root</a>/<a href='/guix/log/gnu?id=f58764d8ed633a8ad1c9f2578be7bbde36ed7ce7'>gnu</a>/<a href='/guix/log/gnu/packages?id=f58764d8ed633a8ad1c9f2578be7bbde36ed7ce7'>packages</a>/<a href='/guix/log/gnu/packages/sync.scm?id=f58764d8ed633a8ad1c9f2578be7bbde36ed7ce7'>sync.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/sync.scm?id=f58764d8ed633a8ad1c9f2578be7bbde36ed7ce7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-01-19 17:28:31 +0100'>2018-01-19</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=162a13740041f907f0ce5c2aa05b52b162b4e81a'>gnu: Consistently Write ‘file system(s)’.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-01-10 15:59:47 +0100'>2018-01-10</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=9358ae8adf4fc3dbbe4164d0bc16d5ce11b41393'>gnu: lsyncd: Update to 2.2.2.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-11-18 21:50:11 +0200'>2017-11-18</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=5af27a82c3f95eaa560e2771b629a93693c7f442'>gnu: owncloud-client: Update to 2.3.4.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-11-18 21:50:08 +0200'>2017-11-18</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=6563d58c7e94bee8b9beeefa929ab2e982d86fa0'>gnu: owncloud-client: Don't check for updates.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-09-17 10:14:14 +0300'>2017-09-17</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=5fb17ed92e910030b86cc6f1eec50a2c3b725b08'>gnu: owncloud-client: Update to 2.3.3.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-07-20 00:35:02 +0200'>2017-07-20</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=dc05f6523eb424bfeb4ddd2bf157232b4a72ca77'>gnu: qsyncthingtray: Update to 0.5.8.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-04-26 22:04:01 +0300'>2017-04-26</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=be58ffa4aa518686294726bdd83733eca4e6c03c'>gnu: owncloud-client: Update to 2.3.1.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-01-24 15:46:01 +0100'>2017-01-24</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=7ee557a75a695dbbdfa5187bdf85b530e0f92fbf'>gnu: Add lsyncd.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>