A deps entry such as:

jsr310-tagged-literals {:mvn/version "0.1.4" :exclusions [cljs.java-time]}

is generated as

<dependency>
<groupId>jsr310-tagged-literals</groupId>
<artifactId>jsr310-tagged-literals</artifactId>
<version>0.1.4</version>
<exclusions>
<exclusion>
<groupId/></groupId>
<artifactId>cljs.java-time</artifactId>
</exclusion>
</exclusions>
</dependency>

which is inconsistent with how a dependency on e.g. cljs.java-time appears, because in that case the groupId is filled in as cljs.java-time.

This issue was noticed because clj -Stree fails when reading such a pom, with an error '/cljs.java-time is not a valid symbol'