--- CMakeLists.txt.orig	2022-09-01 16:15:02 UTC
+++ CMakeLists.txt
@@ -201,7 +201,7 @@ endif ()
 
 # Check for Qt...
 if (CONFIG_QT6)
-  find_package (Qt6 QUIET)
+  find_package (Qt6 REQUIRED QUIET)
   if (NOT Qt6_FOUND)
     set (CONFIG_QT6 0)
   endif ()
@@ -385,7 +385,7 @@ endif ()
 
 # Check for MAD libraries.
 if (CONFIG_LIBMAD)
-  pkg_check_modules (MAD IMPORTED_TARGET mad)
+  pkg_check_modules (MAD IMPORTED_TARGET libmad)
   if (NOT MAD_FOUND)
     message (WARNING "*** MAD library not found.")
     set (CONFIG_LIBMAD 0)