diff --git a/src/modules/meson.build b/src/modules/meson.build
index 59f46ae13..3fa3d9f89 100644
--- a/src/modules/meson.build
+++ b/src/modules/meson.build
@@ -110,6 +110,7 @@ if build_module_jack_tunnel
     install_dir : modules_install_dir,
     install_rpath: modules_install_dir,
     dependencies : [mathlib, dl_lib, pipewire_dep],
+    c_args: '-DNIXPKGS_LIBJACK_PATH="@0@"'.format(jack_dep.get_variable('libdir'))
   )
   build_module_jackdbus_detect = dbus_dep.found()
   if build_module_jackdbus_detect
diff --git a/src/modules/module-jack-tunnel/weakjack.h b/src/modules/module-jack-tunnel/weakjack.h
index 472adb253..cffca1dde 100644
--- a/src/modules/module-jack-tunnel/weakjack.h
+++ b/src/modules/module-jack-tunnel/weakjack.h
@@ -167,8 +167,7 @@ static inline int weakjack_load(struct weakjack *jack, const char *lib)
 
 	search_dirs = getenv("LIBJACK_PATH");
 	if (!search_dirs)
-		search_dirs = PREFIX "/lib64/:" PREFIX "/lib/:"
-			"/usr/lib64/:/usr/lib/:" LIBDIR;
+		search_dirs = NIXPKGS_LIBJACK_PATH;
 
 	res = -ENAMETOOLONG;