From line 6 of the new bld_appimage.sh it says:

60 # Use own version of linuxdeploy, makeappimage. This should be in 61 # subdirectory tools, if not, go to tools/makeappimagetool and do bld.sh 62 # there. That will place the makeappimage executable in tools, and 63 # then delete all other generated files (except the small log). The tools 64 # directory is not cleared with "make clean" or "autogen.sh clean" Maybe you should correct "subdirectory tools" in "subdirectory cinelerra-5.1"? If you confirm it I'll fix the manual by putting the "our" linuxdeploy (i.e. "makeappimagetool", if I understand correctly) instead of the git one. https://cinelerra-gg.org/download/CinelerraGG_Manual/Build_CinGG_AppImage_fr...