gistfile1.txt

remote:        Installing collected packages: markupsafe, six, PyYAML, webassets, itsdangerous, Jinja2, Werkzeug, python-frontmatter, hamlish-jinja, Flask-Assets, frozen-flask, gunicorn, flask
remote:          Running setup.py install for markupsafe
remote:            building 'markupsafe._speedups' extension
remote:            gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/app/.heroku/python/include/python2.7 -c markupsafe/_speedups.c -o build/temp.linux-x86_64-2.7/markupsafe/_speedups.o
remote:            gcc -pthread -shared build/temp.linux-x86_64-2.7/markupsafe/_speedups.o -o build/lib.linux-x86_64-2.7/markupsafe/_speedups.so
remote:
remote:          Running setup.py install for PyYAML
remote:            checking if libyaml is compilable
remote:            gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/app/.heroku/python/include/python2.7 -c build/temp.linux-x86_64-2.7/check_libyaml.c -o build/temp.linux-x86_64-2.7/check_libyaml.o
remote:            build/temp.linux-x86_64-2.7/check_libyaml.c:2:18: fatal error: yaml.h: No such file or directory
remote:             #include <yaml.h>
remote:                              ^
remote:            compilation terminated.
remote:            libyaml is not found or a compiler error: forcing --without-libyaml
remote:            (if libyaml is installed correctly, you may need to
remote:             specify the option --include-dirs or uncomment and
remote:             modify the parameter include_dirs in setup.cfg)
remote:          Running setup.py install for webassets
remote:            Installing webassets script to /app/.heroku/python/bin