diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 000000000..10c074443
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,35 @@
+name: C/C++ CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: install ctags
+      run: sudo apt-get install -y universal-ctags
+    - name: install shellcheck
+      run: sudo apt-get install -y shellcheck
+    - name: clone seqcexit
+      run: git clone https://github.com/lcn2/seqcexit
+    - name: install seqcexit
+      run: cd seqcexit && make install
+    - name: clone picky
+      run: git clone https://github.com/xexyl/picky
+    - name: install picky
+      run: cd picky && make && cp -p picky /usr/local/bin
+    - name: make
+      run: make
+    - name: make slow_prep
+      run: make slow_prep
+    - name: make clobber all test
+      run: make clobber all test
+    - name: make clobber
+      run: make clobber
diff --git a/Makefile b/Makefile
index 8f2f042cf..85d01c05c 100644
--- a/Makefile
+++ b/Makefile
@@ -558,7 +558,7 @@ reset_min_timestamp: soup/Makefile
 #
 prep: test_ioccc/prep.sh
 	${Q} ${RM} -f ${TMP_BUILD_LOG}
-	${Q} ./test_ioccc/prep.sh -l "${TMP_BUILD_LOG}"; \
+	${Q} ./test_ioccc/prep.sh -m${MAKE} -l "${TMP_BUILD_LOG}"; \
 	    EXIT_CODE="$$?"; \
 	    ${MV} -f ${TMP_BUILD_LOG} ${BUILD_LOG}; \
 	    if [[ $$EXIT_CODE -ne 0 ]]; then \
@@ -576,7 +576,7 @@ prep: test_ioccc/prep.sh
 #
 slow_prep: test_ioccc/prep.sh
 	${Q} ${RM} -f ${TMP_BUILD_LOG}
-	${Q} ./test_ioccc/prep.sh; \
+	${Q} ./test_ioccc/prep.sh -m${MAKE}; \
 	    EXIT_CODE="$$?"; \
 	    if [[ $$EXIT_CODE -ne 0 ]]; then \
 		echo; \
@@ -605,7 +605,7 @@ build: release
 pull: release
 release: test_ioccc/prep.sh
 	${Q} ${RM} -f ${TMP_BUILD_LOG}
-	${Q} ./test_ioccc/prep.sh -e -o -l "${TMP_BUILD_LOG}"; \
+	${Q} ./test_ioccc/prep.sh -m${MAKE} -e -o -l "${TMP_BUILD_LOG}"; \
 	    EXIT_CODE="$$?"; \
 	    ${MV} -f ${TMP_BUILD_LOG} ${BUILD_LOG}; \
 	    if [[ $$EXIT_CODE -ne 0 ]]; then \
diff --git a/test_ioccc/prep.sh b/test_ioccc/prep.sh
index 9612a02c7..596c41ea1 100755
--- a/test_ioccc/prep.sh
+++ b/test_ioccc/prep.sh
@@ -64,7 +64,7 @@ while getopts :hv:Veom:M:l: flag; do
     V)	echo "$PREP_VERSION"
 	exit 1
 	;;
-    m)	MAKE="$OPTARG";
+    m)	export MAKE="$OPTARG";
 	;;
     M)	MAKEFILE="$OPTARG";
 	;;
@@ -316,7 +316,7 @@ make_bug_report() {
 	EXIT_CODE="$CODE"
 
 	FAILURE_SUMMARY="$FAILURE_SUMMARY
-	make bug_report-txl $EXIT_CODE: $MAKE bug_report-txl -L $BUG_REPORT_LOGFILE: non-zero exit code: $status"
+	$MAKE bug_report-txl $EXIT_CODE: $MAKE bug_report-txl -L $BUG_REPORT_LOGFILE: non-zero exit code: $status"
 	if [[ -z "$LOGFILE" ]]; then
 	    write_echo "$0: Warning: EXIT_CODE is now: $EXIT_CODE" 1>&2
 	fi