Unable to run custom queries against GitHub Actions

まず、スタンドアロンの CodeQL コマンドと GitHub Actions の呼び出し、および生成された codescanning 設定を比較します。actions-queries/pull_request_target.ql と、リンク先の pull request に示されている workflow を調べ、Actions クエリが定義されていない理由を特定した後に workflow を再実行します。カスタムクエリが fatal error なしで Actions 経由で実行されれば完了です。

I've been trying to use codeql to check my GitHub Actions workflows. I've got it kinda working here:

https://github.com/billnapier/github-actions-check-workflow/pulls

I can test things, and when I run codeql standalone, stuff works just fine:

codeql database create --force-overwrite --db-cluster /workspaces/c 
--source-root=/workspaces/github-actions-check-workflow --calculate-language-specific-baseline --extractor-include-aliases --sublanguage-file-
coverage --language=actions --search-path /workspaces/codeql-action --build-mode=none

and then run the query:

codeql query run --database /workspaces/c/actions -- actions-queries/pull_request_target.ql

So my query is well formed, and I can generate the DB. But when I try and run it via Actions, I get this output instead (also in the PR):

Encountered a fatal error while running "/opt/hostedtoolcache/CodeQL/2.20.3/x64/codeql/codeql database init --force-overwrite --db-cluster /home/runner/work/_temp/codeql_databases --source-root=/home/runner/work/github-actions-check-workflow/github-actions-check-workflow --calculate-language-specific-baseline --extractor-include-aliases --sublanguage-file-coverage --language=actions --search-path /home/runner/work/_actions/github/codeql-action/v3/actions-extractor --codescanning-config=/home/runner/work/_temp/user-config.yaml --build-mode=none". Exit code was 2 and error was: A fatal error occurred: No queries defined for actions. See the logs for more details.

I've been trying to debug the "No queries defined for actions", but I'm stumped. I'm guessing that I'm missing something specifying what language my query is used for, but I have no idea what I'm missing.