Linking... Warning: Unable to setup directory cache: '/opt/clean/lib/Gast/Clean System Files'. Linking 'test0.exe' [test0.exe,]: does not exist. Linking new executable. Finished making. $ clm -IL Platform -I ../Libraries with_options Overloading error [with_options.icl,49,conversion_invariant]: "Foldable" no instance available of type Set Compiling with_options ERROR: Job failed: exit code 1