cmake: Even less yelling.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2633b2f..31182ec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -488,7 +488,7 @@
 endif()
 
 # Add targets to the build-tree export set
-EXPORT(TARGETS zip
+export(TARGETS zip
   FILE "${PROJECT_BINARY_DIR}/${PROJECT_NAME}-targets.cmake")
 
 # installation