I am actually struggling with this error on our centos server all day, this is how I fixed it. I could not recover everything from my commandline history but this is what I could find out. Hope it will be helpful. I am sure while cleaning up my server for production it will be helpful to me. So cheers!

All this started with this error message on my centos server:

npm-2 Unhandled rejection SequelizeDatabaseError: You need JSON-C for ST_GeomFromGeoJSON
npm-2     at Query.formatError (/home/centos/jobcue.com/node_modules/sequelize/lib/dialects/postgres/query.js:357:14)
npm-2     at null. (/home/centos/jobcue.com/node_modules/sequelize/lib/dialects/postgres/query.js:88:19)
npm-2     at emitOne (events.js:77:13)
npm-2     at emit (events.js:169:7)
npm-2     at Query.handleError (/home/centos/jobcue.com/node_modules/pg/lib/query.js:108:8)
npm-2     at null. (/home/centos/jobcue.com/node_modules/pg/lib/client.js:171:26)
npm-2     at emitOne (events.js:77:13)
npm-2     at emit (events.js:169:7)
npm-2     at Socket. (/home/centos/jobcue.com/node_modules/pg/lib/connection.js:109:12)
npm-2     at emitOne (events.js:77:13)
npm-2     at Socket.emit (events.js:169:7)
npm-2     at readableAddChunk (_stream_readable.js:153:18)
npm-2     at Socket.Readable.push (_stream_readable.js:111:10)
npm-2     at TCP.onread (net.js:531:20)

When I tried to install json-c on server it was like:

sudo yum install json-c
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.eecs.wsu.edu
 * epel: s3-mirror-us-west-2.fedoraproject.org
 * extras: linux.mirrors.es.net
 * updates: mirror.raystedman.net
Package json-c-0.11-4.el7_0.x86_64 already installed and latest version
Nothing to do

Then I started panicing. Tried 5-6 hours long yum battles and figure out a solution that would look like following:

Install some dependencies at first:

yum install geos-devel.x86_64
yum install proj-devel.x86_64
yum install gdal-devel.x86_64
yum install libxml2-devel.x86_64
yum install json-c-devel.x86_64

yum install postgresql92-devel
sudo yum install postgresql-server 

sudo yum install geos geos-devel

wget http://download.osgeo.org/proj/proj-4.8.0.tar.gz
gzip -d proj-4.8.0.tar.gz
tar -xvf proj-4.8.0.tar
cd proj-4.8.0
./configure
make
sudo make install

I needed to install gdal:

installing gdal:

sudo rpm -Uvh http://elgis.argeo.org/repos/6/elgis-release-6-6_0.noarch.rpm
sudo yum install -y gdal
./configure
make
make install

Obviously I needed to install json c:

sudo yum install json-c-devel

I needed to know where it is located:

rpm -ql json-c json-c-devel

for me it was at:

/usr/include/*

Now it is time to built our postgis like this:

wget http://download.osgeo.org/postgis/source/postgis-2.2.1.tar.gz
tar xvzf postgis-2.2.1.tar.gz
cd postgis-2.2.1
./configure --with-jsonc=/usr/include

make
make install
sudo make install