Swiftly packages aren't working for me

[Molanda]

I'm trying to use Swiftly, but the packages don't seem to work.

First, I tried the instructions here. It claimed to install successfully, but ~/.swiftly didn't get created. I tried from both the command line and from the UI.

Then I tried installing it using brew. This time it worked. I performed the swiftly init, updated the env, and verified the variables were set.

SWIFTLY_HOME_DIR=/Volumes/Local/Brian/.swiftly
SWIFTLY_BIN_DIR=/Volumes/Local/Brian/.swiftly/bin
SWIFTLY_TOOLCHAINS_DIR=/Volumes/Local/Brian/Library/Developer/Toolchains

When I try to install swift, the download completes, but the package installation fails.

% swiftly install 6.3.1 --verbose
Swiftly is currently unlinked and will not manage the active toolchain. You can run
the following command to link swiftly to the active toolchain:

    $ swiftly link


Installing Swift 6.3.1
                                                                                                                    Downloading Swift 6.3.1
100% [===========================================================================================================================================================================================================================================]
Downloaded 1433.7 MiB of 1433.7 MiB

Attempting to acquire installation lock at /Volumes/Local/Brian/.swiftly/swiftly.lock ...
Acquired installation lock
Installing package in user home directory...
installer: Cannot install on volume /Volumes/Local because it is disabled.
installer:
Error: RunProgramError(exitCode: 1, program: "installer", arguments: ["-verbose", "-pkg", "/var/folders/f9/dsnl9q397sxbfky_b875sj6r0000gq/T/swiftly-BCF6CFED-5CB2-49C4-88C8-50DA4B96A965.pkg", "-target", "CurrentUserHomeDirectory"])

This is a Mac mini 2018 running Sequoia 15.7.7.

Please let me know if you need additional information.