Whenever I run 'dist-clean', it crashes after deleting everything, because the script is trying to find 'spec.gmk' in the now-deleted directory. I don't notice any negative consequences, just messy logs.

Seems to have been introduced by JDK-8349665.

% -> bash configure --with-boot-jdk=~/bin/jdk/jdk-25.jdk/Contents/Home
...
====================================================
A new configuration has been successfully created in
/Users/dan/Dev/jdk/oracle/build/macosx-aarch64-server-release
using configure arguments '--with-boot-jdk='~/bin/jdk/jdk-25.jdk/Contents/Home''.
...

% -> make dist-clean
...
Removing configuration directory for 'macosx-aarch64-server-release'
Cleaned everything, you will have to re-run configure.
MakeFileStart.gmk:40: *** make/Init.gmk: spec.gmk file /Users/dan/Dev/jdk/oracle/build/macosx-aarch64-server-release/spec.gmk is missing. Stop.
make[1]: *** [main] Error 2
make: *** [dist-clean] Error 2