--- CMakeLists.txt	2021-05-22 11:30:27.958294663 +0200
+++ CMakeLists.txt.new	2021-05-22 11:29:17.120943327 +0200
@@ -14,6 +14,8 @@
 
 option(EXT_DYLIB "build extempore as a dynamic library" OFF)
 
+option(JACK "use the Jack Portaudio backend" ON)
+
 ## this is useful because we can group targets together (e.g. all the AOT libs)
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
@@ -186,6 +188,7 @@
   -DPA_BUILD_STATIC=ON
   -DPA_BUILD_SHARED=OFF
   -DPA_LIBNAME_ADD_SUFFIX=OFF
+  -DPA_USE_JACK=${JACK}
   -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
   -DCMAKE_C_FLAGS=${EXT_DEPS_C_FLAGS}
   -DCMAKE_CXX_FLAGS=${EXT_DEPS_CXX_FLAGS}