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    1:01:32 AM: Now using node v6.9.4 (npm v3.10.10)
    1:01:32 AM: Using version v6.9.4 of node
    1:01:32 AM: ruby-2.3.1 - #gemset created /opt/buildhome/.rvm/gems/ruby-2.3.1@hspace
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    1:03:07 AM: Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /opt/build/cache/bundle/ruby/2.3.0/gems/pg-0.18.4/ext
    /opt/buildhome/.rvm/rubies/ruby-2.3.1/bin/ruby -r
    ./siteconf20170109-812-uyiiep.rb extconf.rb
    checking for pg_config... no
    No pg_config... trying anyway. If building fails, please try again with
    --with-pg-config=/path/to/pg_config
    checking for libpq-fe.h... no
    Can't find the 'libpq-fe.h header
    *** extconf.rb failed ***
    Could not create Makefile due to some reason, probably lack of necessary
    libraries and/or headers. Check the mkmf.log file for more details. You may
    need configuration options.

    Provided configuration options:
    --with-opt-dir
    --without-opt-dir
    --with-opt-include
    --without-opt-include=${opt-dir}/include
    --with-opt-lib
    --without-opt-lib=${opt-dir}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/opt/buildhome/.rvm/rubies/ruby-2.3.1/bin/$(RUBY_BASE_NAME)
    --with-pg
    --without-pg
    --enable-windows-cross
    --disable-windows-cross
    --with-pg-config
    --without-pg-config
    --with-pg_config
    --without-pg_config
    --with-pg-dir
    --without-pg-dir
    --with-pg-include
    --without-pg-include=${pg-dir}/include
    --with-pg-lib
    --without-pg-lib=${pg-dir}/lib

    To see why this extension failed to compile, please check the mkmf.log which can
    be found here:

    /opt/build/cache/bundle/ruby/2.3.0/extensions/x86_64-linux/2.3.0/pg-0.18.4/mkmf.log

    extconf failed, exit code 1

    Gem files will remain installed in
    /opt/build/cache/bundle/ruby/2.3.0/gems/pg-0.18.4 for inspection.
    Results logged to
    /opt/build/cache/bundle/ruby/2.3.0/extensions/x86_64-linux/2.3.0/pg-0.18.4/gem_make.out

    An error occurred while installing pg (0.18.4), and Bundler cannot continue.
    Make sure that `gem install pg -v '0.18.4'` succeeds before bundling.
    1:03:07 AM: Error during gem install
    1:03:07 AM: Error running command: Build script returned non-zero exit code: 1
    1:03:06 AM: Error running command: Build script returned non-zero exit code: 1
    1:03:07 AM: Finished processing build request