Raspberry Pi 4. I went to pharo.org/download And downloaded both PharoLauncher-linux-2.0-x64.zip and pharo-linux-stable.zip. I extracted them into separate directories. I believe Pi 4 B is indeed 64 bit, but read somewhere that the Raspian installer installs a 32 bit O/S. I would expect uname to tell me which. It just says Linux pi 4.19.97-v7l+ #1294 SMP Thu Jan 30 13:21:14 GMT 2020 armv7l GNU/Linux Both of these these files extracted say the same thing when I try to run them: 64 bit: pi@pi:~/Pharo/pharolauncher $ ./pharo-l* Error. Could not determine platform's libc path for VM. Try forcing $PLATFORMLIBDIR in /home/pi/Pharo/pharolauncher/pharo-vm/pharo, based on LIBC_SO. Please report what works to pharo [vm-dev] mail list. LIBC_SO= PRETTY_NAME="Raspbian GNU/Linux 10 (buster)" NAME="Raspbian GNU/Linux" VERSION_ID="10" VERSION="10 (buster)" VERSION_CODENAME=buster ID=raspbian ID_LIKE=debian UNAME=Linux pi 4.19.97-v7l+ #1294 SMP Thu Jan 30 13:21:14 GMT 2020 armv7l GNU/Linux 32 bit: pi@pi:~/Pharo/32 bit/pharo-linux-stable/bin $ ./pharo Error. Could not determine platform's libc path for VM. Try forcing $PLATFORMLIBDIR in ./pharo, based on LIBC_SO. Please report what works to pharo [vm-dev] mail list. LIBC_SO= PRETTY_NAME="Raspbian GNU/Linux 10 (buster)" NAME="Raspbian GNU/Linux" VERSION_ID="10" VERSION="10 (buster)" VERSION_CODENAME=buster ID=raspbian ID_LIKE=debian UNAME=Linux pi 4.19.97-v7l+ #1294 SMP Thu Jan 30 13:21:14 GMT 2020 armv7l GNU/Linux Any clues?