installing quarks on bela is possible right?

I would assume so, but you won't be able to use the Quark GUI. Also, if the Quarks are fetched from a remote server you'll need to connect the board to the internet, but to work around that you could manually download the Quark to the board first. Which ones(s) would you like to install?

    I went through this. The following instructions install the

    cd /tmp
ssh -o StrictHostKeyChecking=no root@bela.local exit # force key creation
git clone https://github.com/supercollider-quarks/quarks
git clone https://github.com/crucialfelix/crucial-library
git clone https://github.com/supercollider-quarks/ddwCommon
rsync -a quarks ddwCommon crucial-library root@bela.local: # may take a while
git clone https://github.com/supercollider/supercollider
git -C supercollider checkout b8ddcaf0f89c019af0f682a49f5df1c516578067
rsync -a supercollider/SCClassLibrary/* root@bela.local:/usr/share/SuperCollider/SCClassLibrary/

    Note that the last two steps install all the SCClassLibrary files from upstream Sc. This includes the GUI files that are necessary to prevent crucial-library from failing while compiling the class library. This means that parts of crucial-library and possibly of ddwCommon

    then you can run this in a .scd file on Bela:

    Quarks.install("/root/quarks");
Quarks.install("/root/crucial-library");
Quarks.install("/root/ddwCommon");

    You should see a couple of errors about not being able to connect to GitHub:

    Cloning into '/root/.local/share/SuperCollider/downloaded-quarks/quarks'...
fatal: unable to access 'https://github.com/supercollider-quarks/quarks.git/': Could not resolve host: github.com
ERROR: 
Failed to read quarks directory listing: https://github.com/supercollider-quarks/quarks.git
ERROR: Primitive '_FileReadLine' failed.
Failed.

    , but everything should actually work.

    When you stop and restart the project you will see

    	Found 738 primitives.
	Compiling directory '/usr/share/SuperCollider/SCClassLibrary'
	Compiling directory '/usr/share/SuperCollider/Extensions'
	Compiling directory '/root/.local/share/SuperCollider/Extensions'
	Compiling directory '/root/quarks'
	Compiling directory '/root/crucial-library'
	Compiling directory '/root/ddwCommon'

    and you should not get any error.

    Now, this will make the class library compile, but I cannot guarantee it will work (specifically, all the GUI stuff will still not work).