Your system information

• Steam client version (build number or date): N/A
• Distribution (e.g. Ubuntu): Arch Linux
• Opted into Steam client beta?: [Yes/No] N/A
• Have you checked for system updates?: [Yes/No] Yes

Extra info:
Using a ZFS dataset for my /home, and EXT4 for /
ZFS is using 2 8TB hard drives in a mirrored pair

Please describe your issue in as much detail as possible:

When running steam initially, it is unable to determine the amount of free disk space in the filesystem in order to install the client, and opens a message window that says Fatal Error: Steam needs at least 250MB of free disk space to update.

I was able to get it to install by creating an EXT4 zvol and linking .steam and .local/share/Steam to directories in the EXT4 volume. After it was installed, I was able to move the directories back to ZFS and Steam worked fine.

Steam log: https://ptpb.pw/sD_E

Steps for reproducing this issue:

1. Create and mount a ZFS dataset in the home directory
2. Run steam