here's the failed build with dh-elpa 2.0.12
dh_elpa_test emacs -batch -Q -l package --eval "(setq native-compile-target-directory \"/tmp/NpGLjk7chP\")" --eval "(add-to-list 'package-directory-list \"/usr/share/emacs/site-lisp/elpa\")" --eval "(add-to-list 'package-directory-list \"/usr/share/emacs/site-lisp/elpa-src\")" -f package-initialize -L . -l simple-httpd-test.el --eval \(ert-run-tests-batch-and-exit\) Running 10 tests (2022-09-26 10:33:27+0000, selector âtâ) passed 1/10 httpd-clean-path-test (0.000103 sec) passed 2/10 httpd-get-servlet-test (0.000080 sec) passed 3/10 httpd-mime-test (0.000062 sec) passed 4/10 httpd-parse-args-test (0.000060 sec) passed 5/10 httpd-parse-endpoint (0.000057 sec) passed 6/10 httpd-parse-test (0.001130 sec) passed 7/10 httpd-parse-uri-test (0.000063 sec) passed 8/10 httpd-send-header-test (0.213662 sec) Test httpd-status-test backtrace: native-elisp-load("/sbuild-nonexistent/.emacs.d/eln-cache/28.1-73153 comp-trampoline-search(file-readable-p) comp-subr-trampoline-install(file-readable-p) fset(file-readable-p (lambda (file) nil)) (progn (fset 'file-exists-p #'(lambda (file) t)) (fset 'file-readabl (unwind-protect (progn (fset 'file-exists-p #'(lambda (file) t)) (fs (let ((file-exists-p (symbol-function 'file-exists-p)) (file-readabl (let ((lexical-binding nil)) (let ((file-exists-p (symbol-function ' (lambda nil (let ((lexical-binding nil)) (let ((file-exists-p (symbo ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test ert-run-test(#s(ert-test :name httpd-status-test :documentation "Tes ert-run-or-rerun-test(#s(ert--stats :selector t :tests [... ... ... ert-run-tests(t #f(compiled-function (event-type &rest event-args) # ert-run-tests-batch(nil) ert-run-tests-batch-and-exit() command-line-1(("-l" "package" "--eval" "(setq native-compile-target command-line() normal-top-level() Test httpd-status-test condition: (native-lisp-load-failed "file does not exists" "/sbuild-nonexistent/.emacs.d/eln-cache/28.1-73153f3e/subr--trampoline-66696c652d7265616461626c652d70_file_readable_p_0.eln") FAILED 9/10 httpd-status-test (0.364922 sec) passed 10/10 httpd-unhex-test (0.000129 sec)