CqlToR4Library error: fhirhelpers not found

Describe the bug
When running CqlToR4Library on a CQL file that depends on FHIRHelpers, the tooling reports the following error:

java.lang.IllegalArgumentException: Referenced library: fhirhelpers not found
    at org.opencds.cqf.tooling.library.r4.LibraryGenerator.processLibrary (LibraryGenerator.java:41)
    at org.opencds.cqf.tooling.library.BaseLibraryGenerator.execute (BaseLibraryGenerator.java:66)
    at org.opencds.cqf.tooling.cli.Main.main (Main.java:235)
    at org.codehaus.mojo.exec.ExecJavaMojo$1.run (ExecJavaMojo.java:279)
    at java.lang.Thread.run (Thread.java:829)

I am including FHIRHelpers.cql in the same directory, and I have also tried various other file names (FHIRHelpers-4.0.1.cql, fhirhelpers.cql, fhirhelpers-4.0.1.cql). No matter what, I cannot get past this error.

To Reproduce
Steps to reproduce the behavior:

1. Download and unzip this simple folder of CQL: SimpleLibrary.zip
2. Run the following command from this project's tooling-cli directory: mvn exec:java -Dexec.mainClass="org.opencds.cqf.tooling.cli.Main" -Dexec.args="-CqlToR4Library -ptcql=/Path/To/SimpleLibrary/SimpleLibrary.cql" (replacing the path with the correct one for your system)
3. Observer the error

Expected behavior
It should generate the library for SimpleCQL.cql.

Desktop (please complete the following information):

• OS: Mac OS Ventura
• Java Version: openjdk 11.0.17

Start with org.opencds.cqf.tooling.library.r4.LibraryGenerator at LibraryGenerator.java:41 and trace the referenced-library lookup through BaseLibraryGenerator.java:66. Reproduce with the provided SimpleLibrary.zip and the CqlToR4Library Maven command, comparing how FHIRHelpers.cql is named and resolved. Done means the command generates the library for SimpleCQL.cql without the fhirhelpers-not-found error.