--- CMakeLists.txt.orig	2023-09-19 04:20:31 UTC
+++ CMakeLists.txt
@@ -100,7 +100,7 @@ endif ()
 endif ()
 
 # Find all the required libraries and programs.
-find_package(absl)
+find_package(absl REQUIRED)
 
 if(NOT absl_FOUND)
   # Overide abseil install rules for subprojects