Weirdly enough, it did work that time, but froze the game when I tried to exit. I tried another time and it didn't run the game and gave some errors like:
[___](ERROR: ld.so: object '/REDACTED/.steam/debian-installation/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
)
and
Initializing steam
Setting breakpad minidump AppID = 462770
free(): invalid pointer
and then a long stacktrace. No idea what it means.