I am trying to build an app using `grunt build` and I got this error:
# grunt build
Running "clean:dist" (clean) task
Running "wiredep:app" (wiredep) task
Running "wiredep:sass" (wiredep) task
Running "includeSource:dist" (includeSource) task
File "dist/index.html" created.
Running "useminPrepare:html" (useminPrepare) task
Configuration changed for concat, uglify, cssmin
Running "concurrent:dist" (concurrent) task
>> Warning: There are more tasks than your concurrency limit. After this limit
>> is reached no further tasks will be run until the current tasks are
>> completed. You can adjust the limit in the concurrent task options
Warning: Running "imagemin:dist" (imagemin) task
Warning: Error: Command failed: /var/www/html/mt060915-00-sara/node_modules/grunt-contrib-imagemin/node_modules/imagemin/node_modules/imagemin-optipng/node_modules/optipng-bin/vendor/optipng -strip all -quiet -clobber -o 3 -out /tmp/779c540d-814c-4996-a3c1-9ac2dd258ce6 /tmp/bbb66aa4-f646-41dd-8dd1-92f7440c5166
/var/www/html/mt060915-00-sara/node_modules/grunt-contrib-imagemin/node_modules/imagemin/node_modules/imagemin-optipng/node_modules/optipng-bin/vendor/optipng: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by /var/www/html/mt060915-00-sara/node_modules/grunt-contrib-imagemin/node_modules/imagemin/node_modules/imagemin-optipng/node_modules/optipng-bin/vendor/optipng)
in file app/images/ico-class.png Use --force to continue.
Aborted due to warnings.
Execution Time (2015-07-17 03:52:26 UTC)
loading tasks 7ms ▇▇▇▇▇▇ 11%
imagemin:dist 54ms ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 87%
Total 62ms Use --force to continue.
Aborted due to warnings.
Execution Time (2015-07-17 03:52:24 UTC)
wiredep:app 165ms ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 7%
includeSource:dist 27ms ▇▇▇ 1%
concurrent:dist 2s ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 89%
Total 2.2s
This is the `package.json` file content:
{
"name": "webapp",
"version": "0.0.0",
"private": true,
"dependencies": {
"angular-momentjs": "~0.1.8"
},
"devDependencies": {
"grunt": "^0.4.1",
"grunt-autoprefixer": "^0.7.3",
"grunt-concurrent": "^0.5.0",
"grunt-contrib-clean": "^0.5.0",
"grunt-contrib-compass": "^1.0.1",
"grunt-contrib-concat": "^0.4.0",
"grunt-contrib-connect": "^0.7.1",
"grunt-contrib-copy": "^0.5.0",
"grunt-contrib-cssmin": "^0.9.0",
"grunt-contrib-htmlmin": "^0.3.0",
"grunt-contrib-imagemin": "^0.8.1",
"grunt-contrib-jshint": "^0.10.0",
"grunt-contrib-uglify": "^0.4.0",
"grunt-contrib-watch": "^0.6.1",
"grunt-filerev": "^0.2.1",
"grunt-google-cdn": "^0.4.0",
"grunt-include-source": "~0.4.1",
"grunt-karma": "^0.8.3",
"grunt-newer": "^0.7.0",
"grunt-ngmin": "^0.0.3",
"grunt-svgmin": "^0.4.0",
"grunt-usemin": "^2.1.1",
"grunt-wiredep": "1.8.0",
"jshint-stylish": "^0.2.0",
"karma": "^0.12.17",
"karma-jasmine": "^0.1.5",
"karma-phantomjs-launcher": "^0.1.4",
"load-grunt-tasks": "^0.4.0",
"time-grunt": "^0.3.1",
"try-thread-sleep": "^1.0.0"
},
"engines": {
"node": ">=0.10.0"
},
"scripts": {
"test": "grunt test"
}
}
I've seen [this][1] issue and tried everything in there but doesn't work for me. What is wrong? This is driving me crazy and I don't know why or where it fails, any advice?