diff -Nurd libical-3.0.16.orig/CMakeLists.txt libical-3.0.16/CMakeLists.txt
--- libical-3.0.16.orig/CMakeLists.txt	2022-10-17 16:53:57.000000000 -0400
+++ libical-3.0.16/CMakeLists.txt	2023-03-01 04:26:31.000000000 -0500
@@ -199,12 +199,6 @@
 if(NOT "$ENV{ICU_BASE}" STREQUAL "") #support the old ICU_BASE env
   set(ICU_ROOT $ENV{ICU_BASE})
 endif()
-if(NOT "$ENV{ICU_ROOT}")
-  #Use the homebrew version. MacOS provided ICU doesn't provide development files
-  if(APPLE)
-    set(ICU_ROOT "/usr/local/opt/icu4c")
-  endif()
-endif()
 find_package(ICU COMPONENTS uc i18n)
 set_package_properties(ICU PROPERTIES
   TYPE RECOMMENDED
@@ -241,12 +235,6 @@
 endif()
 
 # compile in Berkeley DB support
-if(NOT "$ENV{BerkeleyDB_ROOT_DIR}")
-  if(APPLE)
-    #Use the homebrew version. Xcode's version doesn't work for us.
-    set(BerkeleyDB_ROOT_DIR "/usr/local/opt/berkeley-db")
-  endif()
-endif()
 find_package(BerkeleyDB)
 set_package_properties(BerkeleyDB PROPERTIES
   TYPE OPTIONAL
diff -Nurd libical-3.0.16.orig/cmake/modules/FindBerkeleyDB.cmake libical-3.0.16/cmake/modules/FindBerkeleyDB.cmake
--- libical-3.0.16.orig/cmake/modules/FindBerkeleyDB.cmake	2022-10-17 16:53:57.000000000 -0400
+++ libical-3.0.16/cmake/modules/FindBerkeleyDB.cmake	2023-03-01 04:35:18.000000000 -0500
@@ -62,13 +62,8 @@
 	endforeach()
 else()
 	# Paths for anything other than Windows
-	# Cellar/berkeley-db is for macOS from homebrew installation
 	list(APPEND _BERKELEYDB_PATHS
-		"/usr"
-		"/usr/local"
-		"/usr/local/Cellar/berkeley-db"
-		"/opt"
-		"/opt/local"
+		"@FINKPREFIX@"
 	)
 endif()