sbt won't start up

[daniel-awake]

When I try to startup sbt in the repo directory, it errors out:

 scalive]$ sbt package
WARNING: A terminally deprecated method in java.lang.System has been called
WARNING: System::setSecurityManager has been called by sbt.TrapExit$ (file:/home/daniel/.sbt/boot/scala-2.12.7/org.scala-sbt/sbt/1.2.8/run_2.12-1.2.8.jar)
WARNING: Please consider reporting this to the maintainers of sbt.TrapExit$
WARNING: System::setSecurityManager will be removed in a future release
error: error while loading String, class file '/modules/java.base/java/lang/String.class' is broken
(class java.lang.NullPointerException/Cannot invoke "scala.tools.nsc.Global$Run.typerPhase()" because the return value of "scala.tools.nsc.Global.currentRun()" is null)
[error] java.io.IOError: java.lang.RuntimeException: /packages cannot be represented as URI
[error] 	at java.base/jdk.internal.jrtfs.JrtPath.toUri(JrtPath.java:175)
[error] 	at scala.tools.nsc.classpath.JrtClassPath.asURLs(DirectoryClassPath.scala:204)
[error] 	at scala.tools.nsc.classpath.AggregateClassPath.$anonfun$asURLs$1(AggregateClassPath.scala:55)
[error] 	at scala.collection.TraversableLike.$anonfun$flatMap$1(TraversableLike.scala:240)
[error] 	at scala.collection.Iterator.foreach(Iterator.scala:937)
[error] 	at scala.collection.Iterator.foreach$(Iterator.scala:937)
[error] 	at scala.collection.AbstractIterator.foreach(Iterator.scala:1425)
[error] 	at scala.collection.IterableLike.foreach(IterableLike.scala:70)
[error] 	at scala.collection.IterableLike.foreach$(IterableLike.scala:69)
[error] 	at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
[error] 	at scala.collection.TraversableLike.flatMap(TraversableLike.scala:240)
[error] 	at scala.collection.TraversableLike.flatMap$(TraversableLike.scala:237)
[error] 	at scala.collection.AbstractTraversable.flatMap(Traversable.scala:104)
[error] 	at scala.tools.nsc.classpath.AggregateClassPath.asURLs(AggregateClassPath.scala:55)
[error] 	at scala.tools.nsc.typechecker.Macros.findMacroClassLoader(Macros.scala:66)
[error] 	at scala.tools.nsc.typechecker.Macros.findMacroClassLoader$(Macros.scala:65)
[error] 	at scala.tools.nsc.Global$$anon$1.findMacroClassLoader(Global.scala:469)
[error] 	at scala.reflect.macros.runtime.MacroRuntimes.$anonfun$defaultMacroClassloaderCache$2(MacroRuntimes.scala:56)
[error] 	at scala.reflect.internal.SymbolTable$perRunCaches$$anon$1.apply(SymbolTable.scala:457)
[error] 	at scala.reflect.macros.runtime.MacroRuntimes.defaultMacroClassloader(MacroRuntimes.scala:58)
...
[error] 	at xsbt.boot.Launch$.withContextLoader(Launch.scala:128)
[error] 	at xsbt.boot.Launch$.run(Launch.scala:109)
[error] 	at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:35)
[error] 	at xsbt.boot.Launch$.launch(Launch.scala:117)
[error] 	at xsbt.boot.Launch$.apply(Launch.scala:18)
[error] 	at xsbt.boot.Boot$.runImpl(Boot.scala:56)
[error] 	at xsbt.boot.Boot$.main(Boot.scala:18)
[error] 	at xsbt.boot.Boot.main(Boot.scala)
[error] java.io.IOError: java.lang.RuntimeException: /packages cannot be represented as URI
[error] Use 'last' for the full log.
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? q

I get the same whether I do sbt or sbt package.

I'm using the tip of master, which is c1e81d083837670e77608f1144974e6a4643bc20 right now, and jdk 1.17.

This isn't urgent-- this looked like an interesting repo and I wanted to try it out.