Assuming you are working on an Ubuntu system here are the steps how to set up the build environment. Basically you can choose your preferred SDK but all tutorials are based on the Qt Creator and we recommend to use that one.
Note: Please take care that you are using the Qt version from the system for building. The nymea server will always be built with the official Qt version for the appropriate system version. The plugin must have the same version like the nymea server.
In the first step you need to install the Qt libraries:
$ sudo apt-get install qtcreator qt5-default qtbase5-dev python dpkg-dev debhelper hardening-wrapper
You can find a good instructions how to install the nymea repository on your system here:
Update your package lists:
$ sudo apt-get update
Now you are ready to install the nymea packages:
$ sudo apt-get install nymea nymea-cli nymea-doc libnymea1-dev nymea-qtcreator-wizards
Once you have successfully installed everything you are ready for Getting started.