Hi, thanks for your help. I tried to open this profile, by > gfp@Tuxedo ~$ source /home/gfp/Projekte/Musescore/guix-profil/etc/profile > or > gfp@Tuxedo ~$ guix shell -p /home/gfp/Projekte/Musescore/guix-profil but it didn’t happen anything. How can I know, that I am now in this profile? Shouldn’t bash show me something? And when I opened the package "musescore" it opened the package musescore in my other profile. So I guess I am not in this profile. -- Kind regards Gottfried