[preprocessor] FIREFOX_SYNC false /home/gareth/Documents/gaia/build_stage/settings,elements,root.html
[preprocessor] FIREFOX_SYNC false /home/gareth/Documents/gaia/build_stage/settings,index.html
[preprocessor] remove file: /home/gareth/Documents/gaia/build_stage/settings/elements/firefox_sync.html
[preprocessor] remove file: /home/gareth/Documents/gaia/build_stage/settings/js/panels/firefox_sync/firefox_sync.js
[preprocessor] remove file: /home/gareth/Documents/gaia/build_stage/settings/js/panels/firefox_sync/panel.js
[preprocessor] remove file: /home/gareth/Documents/gaia/build_stage/settings/js/modules/sync_manager_bridge.js
[preprocessor] remove file: /home/gareth/Documents/gaia/build_stage/settings/style/images/fxsync_error.png
[preprocessor] remove file: /home/gareth/Documents/gaia/build_stage/settings/style/images/fxsync_intro.png
[preprocessor] remove file: /home/gareth/Documents/gaia/build_stage/settings/test/unit/panels/firefox_sync/manager_bridge_test.js
[preprocessor] remove file: /home/gareth/Documents/gaia/build_stage/settings/test/unit/panels/firefox_sync/panel_test.js
Exception: Error:  -*- build/utils.js: [Exception... "Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIFileInputStream.init]"  nsresult: "0x80520012 (NS_ERROR_FILE_NOT_FOUND)"  location: "JS frame :: resource://gre/modules/commonjs/toolkit/loader.js -> file:///home/gareth/Documents/gaia/build/utils-xpc.js :: getFileContent :: line 82"  data: no]
file not found: /home/gareth/Documents/gaia/build_stage/settings/elements/firefox_sync.html

getFileContent@resource://gre/modules/commonjs/toolkit/loader.js -> file:///home/gareth/Documents/gaia/build/utils-xpc.js:98:11
HTMLOptimizer@resource://gre/modules/commonjs/toolkit/loader.js -> file:///home/gareth/Documents/gaia/build/webapp-optimize.js:35:37
WebappOptimize.prototype.processFile@resource://gre/modules/commonjs/toolkit/loader.js -> file:///home/gareth/Documents/gaia/build/webapp-optimize.js:567:23
WebappOptimize.prototype.execute@resource://gre/modules/commonjs/toolkit/loader.js -> file:///home/gareth/Documents/gaia/build/webapp-optimize.js:608:3
execute@resource://gre/modules/commonjs/toolkit/loader.js -> file:///home/gareth/Documents/gaia/build/webapp-optimize.js:622:1
exports.execute@resource://gre/modules/commonjs/toolkit/loader.js -> file:///home/gareth/Documents/gaia/build/post-app.js:24:3
exports.execute@resource://gre/modules/commonjs/toolkit/loader.js -> file:///home/gareth/Documents/gaia/build/build-app.js:17:3
CommonjsRunner.prototype.run@/home/gareth/Documents/gaia/build/xpcshell-commonjs.js:168:5
run@/home/gareth/Documents/gaia/build/xpcshell-commonjs.js:183:3
@-e:1:1

[failed] building settings app failed with exit code 1
Makefile:603: recipe for target 'app' failed
make: *** [app] Error 1