so, when i want to make a patch:
1) i "cd ~/path/to/guix"
2) make changes
3) git add gnu/packages/file_i_changed.scm (gnu/packages/lisp-xyz.scm for example)
4) git commit -m 'gnu: Add sbcl-livesupport'
5) git format-patch origin/master
6) for this one i attached file 0001-gnu-Add-sbcl-livesupport.patch

P.S.: my bad but i don't know how to use email with git. if anyone used tutanota.com please note how to do it