If you build your .nsi script in the /home/user/project folder then it is going to fail as well.
makensis follows symbolic links. So if you put your .nsi file in the parent folder then you would need to adapt the file references to this new base (/home/user/project). In your example this means the following adaption: --- !insertmacro MUI_PAGE_LICENSE "folder/COPYING" ---- -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org