Greetings everybody! I’m new to coding, just trying to learn it for fun, so I’m trying to create a GUI with GTK and Vala.
As a total ignorant, I would know how to set up the IDE for GTK. For this project I use Builder as IDE because I saw that there are not so much choices for Vala (basically I use KDevelop for Python), but when I run the project (copy/paste of the example from the gtk site), it returns that there’s no GTK library or stuff like that. Then, I can’t find into Builder’s Preferences any settings for environment variable.
Please remember, I am a total newbie and I do this in my day off. Not a programmer or expert at all.
Thanks for collab! See ya right here! 
Have you tried to use the project template Builder provides for Vala? Open Builder, click the «Create New Project…» button, and proceed. This will set up a Flatpak-based environment and a small app skeleton that you can use as a starting point.
I guess to have done just that. I setted it up while I created the project. I saw the skeleton of it (src, main.vala, README.MD and so on…).
Maybe I need to know better Builder. I will check better its documentation.
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