Fix the IDEA IntelliJ BSP import of the mill build for the scala-cli repository

[Gedochao]

Version(s)
0.1.11

Describe the bug
When importing scala-cli to IntelliJ via BSP, the following error appears:

Cannot run program "/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-dev_2.13/0.10.5/mill-dev_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.13.8/scala-library-2.13.8.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-scalalib_2.13/0.10.5/mill-scalalib_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-scalajslib_2.13/0.10.5/mill-scalajslib_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-scalanativelib_2.13/0.10.5/mill-scalanativelib_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-bsp_2.13/0.10.5/mill-bsp_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scalameta/scalafmt-dynamic_2.13/3.4.3/scalafmt-dynamic_2.13-3.4.3.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main_2.13/0.10.5/mill-main_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-scalalib-api_2.13/0.10.5/mill-scalalib-api_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-testrunner_2.13/0.10.5/mill-testrunner_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-scalajslib-worker-api_2.13/0.10.5/mill-scalajslib-worker-api_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-scalanativelib-api/0.10.5/mill-scalanativelib-api-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/ch/epfl/scala/bsp4j/2.1.0-M1/bsp4j-2.1.0-M1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-sbt/test-interface/1.0/test-interface-1.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scalameta/scalafmt-interfaces/3.4.3/scalafmt-interfaces-3.4.3.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/interface/0.0.21/interface-0.0.21.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/typesafe/config/1.4.1/config-1.4.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/github/alexarchambault/windows-ansi/windows-ansi/0.0.3/windows-ansi-0.0.3.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-core_2.13/0.10.5/mill-main-core_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-client/0.10.5/mill-main-client-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-api_2.13/0.10.5/mill-main-api_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-util_2.13/0.10.5/mill-main-util_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/eclipse/lsp4j/org.eclipse.lsp4j.generator/0.12.0/org.eclipse.lsp4j.generator-0.12.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/eclipse/lsp4j/org.eclipse.lsp4j.jsonrpc/0.12.0/org.eclipse.lsp4j.jsonrpc-0.12.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/fusesource/jansi/jansi/1.18/jansi-1.18.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite_2.13.8/2.5.4/ammonite_2.13.8-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scalameta/trees_2.13/4.5.8/trees_2.13-4.5.8.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier_2.13/2.1.0-M6/coursier_2.13-2.1.0-M6.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/net/java/dev/jna/jna/5.11.0/jna-5.11.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/net/java/dev/jna/jna-platform/5.11.0/jna-platform-5.11.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/eed3si9n/jarjarabrams/jarjar-abrams-core_2.13/1.8.1/jarjar-abrams-core_2.13-1.8.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mill-main-moduledefs_2.13/0.10.5/mill-main-moduledefs_2.13-0.10.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/os-lib_2.13/0.8.1/os-lib_2.13-0.8.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/upickle_2.13/2.0.0/upickle_2.13-2.0.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-terminal_2.13/2.5.4/ammonite-terminal_2.13-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/fansi_2.13/0.3.1/fansi_2.13-0.3.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/eclipse/xtend/org.eclipse.xtend.lib/2.24.0/org.eclipse.xtend.lib-2.24.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/google/code/gson/gson/2.8.9/gson-2.8.9.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-util_2.13/2.5.4/ammonite-util_2.13-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-runtime_2.13.8/2.5.4/ammonite-runtime_2.13.8-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-interp-api_2.13.8/2.5.4/ammonite-interp-api_2.13.8-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-repl-api_2.13.8/2.5.4/ammonite-repl-api_2.13.8-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-interp_2.13.8/2.5.4/ammonite-interp_2.13.8-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-repl_2.13.8/2.5.4/ammonite-repl_2.13.8-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-compiler_2.13.8/2.5.4/ammonite-compiler_2.13.8-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scalameta/common_2.13/4.5.8/common_2.13-4.5.8.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scalameta/fastparse-v2_2.13/2.3.1/fastparse-v2_2.13-2.3.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/github/plokhotnyuk/jsoniter-scala/jsoniter-scala-core_2.13/2.12.1/jsoniter-scala-core_2.13-2.12.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/github/plokhotnyuk/jsoniter-scala/jsoniter-scala-macros_2.13/2.12.1/jsoniter-scala-macros_2.13-2.12.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.13.8/scala-reflect-2.13.8.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier-core_2.13/2.1.0-M6/coursier-core_2.13-2.1.0-M6.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier-cache_2.13/2.1.0-M6/coursier-cache_2.13-2.1.0-M6.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/eed3si9n/jarjar/jarjar/1.8.1/jarjar-1.8.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.13.8/scala-compiler-2.13.8.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/sourcecode_2.13/0.2.8/sourcecode_2.13-0.2.8.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/kohlschutter/junixsocket/junixsocket-native-common/2.5.0/junixsocket-native-common-2.5.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/kohlschutter/junixsocket/junixsocket-common/2.5.0/junixsocket-common-2.5.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/geny_2.13/0.7.1/geny_2.13-0.7.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ujson_2.13/2.0.0/ujson_2.13-2.0.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/upack_2.13/2.0.0/upack_2.13-2.0.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/upickle-implicits_2.13/2.0.0/upickle-implicits_2.13-2.0.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/eclipse/xtext/org.eclipse.xtext.xbase.lib/2.24.0/org.eclipse.xtext.xbase.lib-2.24.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/eclipse/xtend/org.eclipse.xtend.lib.macro/2.24.0/org.eclipse.xtend.lib.macro-2.24.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-collection-compat_2.13/2.6.0/scala-collection-compat_2.13-2.6.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/pprint_2.13/0.7.1/pprint_2.13-0.7.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/requests_2.13/0.7.0/requests_2.13-0.7.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/mainargs_2.13/0.2.2/mainargs_2.13-0.2.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/ammonite-compiler-interface_2.13.8/2.5.4/ammonite-compiler-interface_2.13.8-2.5.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/fastparse_2.13/2.3.0/fastparse_2.13-2.3.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/modules/scala-xml_2.13/2.0.1/scala-xml_2.13-2.0.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/jline/jline-terminal/3.14.1/jline-terminal-3.14.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/jline/jline-terminal-jna/3.14.1/jline-terminal-jna-3.14.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/jline/jline-reader/3.14.1/jline-reader-3.14.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/scalaparse_2.13/2.3.0/scalaparse_2.13-2.3.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/javassist/javassist/3.21.0-GA/javassist-3.21.0-GA.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/github/javaparser/javaparser-core/3.2.5/javaparser-core-3.2.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/thesamet/scalapb/scalapb-runtime_2.13/0.11.10/scalapb-runtime_2.13-0.11.10.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/github/alexarchambault/concurrent-reference-hash-map/1.1.0/concurrent-reference-hash-map-1.1.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/coursier-util_2.13/2.1.0-M6/coursier-util_2.13-2.1.0-M6.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/io/get-coursier/jniutils/windows-jni-utils/0.3.2/windows-jni-utils-0.3.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-archiver/4.2.7/plexus-archiver-4.2.7.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-container-default/2.1.1/plexus-container-default-2.1.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/ow2/asm/asm/9.2/asm-9.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/ow2/asm/asm-commons/9.2/asm-commons-9.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/ant/ant/1.9.9/ant-1.9.9.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/maven/maven-plugin-api/3.3.9/maven-plugin-api-3.3.9.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/jline/jline/3.21.0/jline-3.21.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/lihaoyi/upickle-core_2.13/2.0.0/upickle-core_2.13-2.0.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/google/guava/guava/27.1-jre/guava-27.1-jre.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/thesamet/scalapb/lenses_2.13/0.11.10/lenses_2.13-0.11.10.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/google/protobuf/protobuf-java/3.19.2/protobuf-java-3.19.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-utils/3.4.1/plexus-utils-3.4.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-io/3.2.0/plexus-io-3.2.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/commons/commons-compress/1.21/commons-compress-1.21.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/iq80/snappy/snappy/0.4/snappy-0.4.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/tukaani/xz/1.9/xz-1.9.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-classworlds/2.6.0/plexus-classworlds-2.6.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/xbean/xbean-reflect/3.7/xbean-reflect-3.7.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/ow2/asm/asm-tree/9.2/asm-tree-9.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/ow2/asm/asm-analysis/9.2/asm-analysis-9.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/ant/ant-launcher/1.9.9/ant-launcher-1.9.9.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/maven/maven-model/3.3.9/maven-model-3.3.9.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/apache/maven/maven-artifact/3.3.9/maven-artifact-3.3.9.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/eclipse/sisu/org.eclipse.sisu.plexus/0.3.2/org.eclipse.sisu.plexus-0.3.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/google/guava/failureaccess/1.0.1/failureaccess-1.0.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/google/guava/listenablefuture/9999.0-empty-to-avoid-conflict-with-guava/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/checkerframework/checker-qual/2.5.2/checker-qual-2.5.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/google/errorprone/error_prone_annotations/2.2.0/error_prone_annotations-2.2.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/mojo/animal-sniffer-annotations/1.17/animal-sniffer-annotations-1.17.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/commons-io/commons-io/2.6/commons-io-2.6.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/javax/enterprise/cdi-api/1.0/cdi-api-1.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/eclipse/sisu/org.eclipse.sisu.inject/0.3.2/org.eclipse.sisu.inject-0.3.2.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/codehaus/plexus/plexus-component-annotations/1.5.5/plexus-component-annotations-1.5.5.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/javax/annotation/jsr250-api/1.0/jsr250-api-1.0.jar:/Users/pchabelski/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/javax/inject/javax.inject/1/javax.inject-1.jar" (in directory "/Users/pchabelski/IdeaProjects/scala-cli"): error=63, File name too long

or the TLDR;

Cannot run program "(...)" (in directory "/Users/pchabelski/IdeaProjects/scala-cli"): error=63, File name too long

To Reproduce
Just pull the scala-cli repository and try importing it to IntelliJ.

Expected behaviour
The scala-cli should get imported out of the box, using the IntelliJ automatic mill BSP import. (as in, the exception mentioned shouldn't be thrown)

Known workarounds
Running the following command allows to directly generate the .idea folder from mill and successfully import it in IntelliJ.

./mill mill.scalalib.GenIdea/idea

of course, the IDE keeps complaining every time the project is reopened.
Some things do not work correctly as well (some of the dependencies are not seen by the IDE, for example), but it's hard to judge whether it's the complexity of the build, faulty support of Scala 3 or just because of importing this way.

Additional context
mill.scalalib.GenIdea/idea seems to be the recommended way for importing a build to IntelliJ these days, looking at the Mill docs

However, out of the box import through BSP seems to be expected to work already, as described here: com-lihaoyi/mill#899 (comment)

Our problem seems to be very similar to com-lihaoyi/mill#962 (although it's replicated with the automatic IntelliJ import)

It might be something in our build is causing the classpath in the BSP connection definition to get too long.