Make some of the changes needed to the 'makeicecat' script, to allow it to run
in a snippet without network access.  After this patch is applied, some
additional changes will be made using 'substitute*'.

diff --git a/makeicecat b/makeicecat
index bf2b7a6..bc3b19b 100755
--- a/makeicecat
+++ b/makeicecat
@@ -58,7 +58,7 @@ readonly SOURCEDIR=icecat-${FFVERSION}
 # debug/shell options
 readonly DEVEL=0
 set -euo pipefail
-(( DEVEL )) && set -x
+set -x
 
 
 ###############################################################################
@@ -459,7 +459,7 @@ configure_search()
     sed 's|ddg@|ddg-html@|' -i browser/components/search/extensions/ddg-html/manifest.json
 
     # Process various JSON pre-configuration dumps.
-    python3 ../../tools/process-json-files.py . browser/components/extensions/schemas/
+    python3 "${DATADIR}"/../tools/process-json-files.py . browser/components/extensions/schemas/
 }
 
 configure_mobile()
@@ -855,12 +855,12 @@ finalize_sourceball()
 # entry point
 ###############################################################################
 
-validate_env || exit 1
-prepare_env
-fetch_source
-verify_sources
-extract_sources
-fetch_l10n
+# validate_env || exit 1
+# prepare_env
+# fetch_source
+# verify_sources
+# extract_sources
+# fetch_l10n
 apply_patches
 configure
 configure_search
@@ -872,4 +872,4 @@ prepare_macos_packaging
 configure_extensions
 configure_onboarding
 apply_bugfixes
-finalize_sourceball
+# finalize_sourceball
ot?id=53f510dad6cc1b55b4abdbbfd55e507a9463a80f'>commit</a><a href='/guix/diff/doc/images/shepherd-graph.dot?id=53f510dad6cc1b55b4abdbbfd55e507a9463a80f'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/doc/images/shepherd-graph.dot'>
<input type='hidden' name='id' value='53f510dad6cc1b55b4abdbbfd55e507a9463a80f'/><input type='hidden' name='showmsg' value='1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=53f510dad6cc1b55b4abdbbfd55e507a9463a80f&amp;showmsg=1'>root</a>/<a href='/guix/log/doc?id=53f510dad6cc1b55b4abdbbfd55e507a9463a80f&amp;showmsg=1'>doc</a>/<a href='/guix/log/doc/images?id=53f510dad6cc1b55b4abdbbfd55e507a9463a80f&amp;showmsg=1'>images</a>/<a href='/guix/log/doc/images/shepherd-graph.dot?id=53f510dad6cc1b55b4abdbbfd55e507a9463a80f&amp;showmsg=1'>shepherd-graph.dot</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/doc/images/shepherd-graph.dot?id=53f510dad6cc1b55b4abdbbfd55e507a9463a80f'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2016-12-17 14:46:42 +0100'>2016-12-17</span></td><td class='logsubject'><a href='/guix/commit/doc/images/shepherd-graph.dot?id=aaee461b9d5fb85fc1a548877dc7eea3dd4fbf50'>doc: Update dot graphs.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* doc/images/bootstrap-packages.dot,
doc/images/coreutils-bag-graph.dot, doc/images/coreutils-graph.dot,
doc/images/shepherd-graph.dot: Regenerate.


</td></tr>
<tr class='logheader'><td><span title='2016-01-29 20:21:54 +0300'>2016-01-29</span></td><td class='logsubject'><a href='/guix/commit/doc/images/shepherd-graph.dot?id=710fa231f03633fe243b52635479d591946fec44'>guix system: Rename 'dmd-graph' to 'shepherd-graph'.</a></td><td>Alex Kost</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* doc/images/dmd-graph.dot: Rename to...
* doc/images/shepherd-graph.dot: ... this.
* doc.am (DOT_FILES): Adjust accordingly.
* guix/scripts/system.scm (dmd-service-node-label)
  (dmd-service-node-type, export-dmd-graph): Rename to...
  (shepherd-service-node-label, shepherd-service-node-type)
  (export-shepherd-graph): ... this.
  (show-help, process-action, process-command): Rename 'dmd-graph' to
  'shepherd-graph'.
* emacs/guix-command.el (guix-command-additional-execute-arguments)
  (guix-command-special-executors): Likewise.
* doc/guix.texi: Likewise.
* doc/emacs.texi (Emacs Popup Interface): Likewise.


</td></tr>