[thunderbird] Error running ./mach run

[nt1m]

 0:02.16 /usr/bin/make -C /home/user/thunderbird/obj-x86_64-pc-linux-gnu -j16 -s backend
 0:03.80 /usr/bin/make -C faster -j16 -s
 0:05.00 Elapsed: 0.00s; From /home/user/thunderbird/obj-x86_64-pc-linux-gnu/dist/bin/gmp-fake/1.0: Kept 1 existing; Added/updated 0; Removed 0 files and 0 directories.
 0:05.06 Elapsed: 0.06s; From /home/user/thunderbird/obj-x86_64-pc-linux-gnu/dist/bin/gmp-fakeopenh264/1.0: Kept 1 existing; Added/updated 0; Removed 0 files and 0 directories.
 0:05.15 Elapsed: 0.16s; From /home/user/thunderbird/obj-x86_64-pc-linux-gnu/dist/bin/gmp-clearkey/0.1: Kept 0 existing; Added/updated 1; Removed 0 files and 0 directories.
 0:05.16 Elapsed: 0.16s; From /home/user/thunderbird/obj-x86_64-pc-linux-gnu/dist/bin/localization: Kept 26 existing; Added/updated 0; Removed 0 files and 0 directories.
 0:05.31 Elapsed: 0.32s; From /home/user/thunderbird/obj-x86_64-pc-linux-gnu/dist/bin/features/wetransfer@extensions.thunderbird.net: Kept 42 existing; Added/updated 0; Removed 0 files and 0 directories.
 0:06.16 Traceback (most recent call last):
 0:06.16   File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
 0:06.17     "__main__", fname, loader, pkg_name)
 0:06.17   File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
 0:06.17     exec code in run_globals
 0:06.17   File "/home/user/thunderbird/python/mozbuild/mozbuild/action/process_install_manifest.py", line 113, in <module>
 0:06.17     main(sys.argv[1:])
 0:06.17   File "/home/user/thunderbird/python/mozbuild/mozbuild/action/process_install_manifest.py", line 100, in main
 0:06.17     defines=args.defines)
 0:06.17   File "/home/user/thunderbird/python/mozbuild/mozbuild/action/process_install_manifest.py", line 69, in process_manifest
 0:06.17     remove_empty_directories=remove_empty_directories)
 0:06.17   File "/home/user/thunderbird/python/mozbuild/mozpack/copier.py", line 430, in copy
 0:06.18     copy_results.append((destfile, f.copy(destfile, skip_if_older)))
 0:06.18   File "/home/user/thunderbird/python/mozbuild/mozpack/files.py", line 578, in copy
 0:06.18     pp.processFile(input=input, output=dest, depfile=deps_out)
 0:06.18   File "/home/user/thunderbird/python/mozbuild/mozbuild/preprocessor.py", line 386, in processFile
 0:06.20     self.do_include(input, False)
 0:06.20   File "/home/user/thunderbird/python/mozbuild/mozbuild/preprocessor.py", line 775, in do_include
 0:06.20     self.handleLine(l)
 0:06.20   File "/home/user/thunderbird/python/mozbuild/mozbuild/preprocessor.py", line 553, in handleLine
 0:06.20     self.write(aLine)
 0:06.20   File "/home/user/thunderbird/python/mozbuild/mozbuild/preprocessor.py", line 434, in write
 0:06.20     filteredLine = self.applyFilters(aLine)
 0:06.20   File "/home/user/thunderbird/python/mozbuild/mozbuild/preprocessor.py", line 409, in applyFilters
 0:06.20     aLine = f[1](aLine)
 0:06.20   File "/home/user/thunderbird/python/mozbuild/mozbuild/preprocessor.py", line 731, in filter_substitution
 0:06.20     return self.varsubst.sub(repl, aLine)
 0:06.20   File "/home/user/thunderbird/python/mozbuild/mozbuild/preprocessor.py", line 729, in repl
 0:06.20     raise Preprocessor.Error(self, 'UNDEFINED_VAR', varname)
 0:06.20 mozbuild.preprocessor.Error: (u'/home/user/thunderbird/comm/calendar/lightning/app.ini', 12, 'UNDEFINED_VAR', 'LIGHTNING_VERSION')
 0:06.28 /home/user/thunderbird/config/faster/rules.mk:90: recipe for target 'install-dist/bin/extensions/{e2fda1a4-762b-4020-b5ad-a41df1933103}' failed
 0:06.28 make: *** [install-dist/bin/extensions/{e2fda1a4-762b-4020-b5ad-a41df1933103}] Error 1
 0:06.28 make: *** Waiting for unfinished jobs....
 0:12.56 Elapsed: 6.89s; From /home/user/thunderbird/obj-x86_64-pc-linux-gnu/dist/bin: Kept 4420 existing; Added/updated 663; Removed 0 files and 0 directories.
 0:12.62 337 compiler warnings present.