diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt
index da99dc3087..2db80b7cc3 100644
--- a/contrib/buildsystems/CMakeLists.txt
+++ b/contrib/buildsystems/CMakeLists.txt
@@ -1005,10 +1005,13 @@ parse_makefile_for_scripts(clar_test_SUITES "CLAR_TEST_SUITES" "")
 list(TRANSFORM clar_test_SUITES PREPEND "${CMAKE_SOURCE_DIR}/t/unit-tests/")
 list(TRANSFORM clar_test_SUITES APPEND ".c")
 add_custom_command(OUTPUT "${CMAKE_BINARY_DIR}/t/unit-tests/clar-decls.h"
-	COMMAND ${CMAKE_SOURCE_DIR}/t/unit-tests/generate-clar-decls.sh "${CMAKE_BINARY_DIR}/t/unit-tests/clar-decls.h" ${clar_test_SUITES}
-	DEPENDS ${CMAKE_SOURCE_DIR}/t/unit-tests/generate-clar-decls.sh ${clar_test_SUITES})
+	COMMAND ${SH_EXE} ${CMAKE_SOURCE_DIR}/t/unit-tests/generate-clar-decls.sh
+		"${CMAKE_BINARY_DIR}/t/unit-tests/clar-decls.h"
+		${clar_test_SUITES}
+	DEPENDS ${CMAKE_SOURCE_DIR}/t/unit-tests/generate-clar-decls.sh
+		${clar_test_SUITES})
 add_custom_command(OUTPUT "${CMAKE_BINARY_DIR}/t/unit-tests/clar.suite"
-	COMMAND "${CMAKE_SOURCE_DIR}/t/unit-tests/generate-clar-suites.sh"
+	COMMAND ${SH_EXE} "${CMAKE_SOURCE_DIR}/t/unit-tests/generate-clar-suites.sh"
 		"${CMAKE_BINARY_DIR}/t/unit-tests/clar-decls.h"
 		"${CMAKE_BINARY_DIR}/t/unit-tests/clar.suite"
 	DEPENDS "${CMAKE_SOURCE_DIR}/t/unit-tests/generate-clar-suites.sh"