@Neo-Rio said in Retroarch build failure on PC:
currently trying to build retroarch fails with an error about "HEAD is now in branch 'retropie-v1.10.0' " and "Error running "git checkout retropie-v.1.12.0"
some patch branch on retropie isn't on github as expected to be or something's going on there.
More likely your local source copy is still present, because v1.10.0 fails to build with Ubuntu 22.04. Clean up the source folder before attempting another install.