diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b0d3a67c21c..f3b1d55c2e6c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -48,9 +48,6 @@ endif()
 if(DEFINED ENV{INSTALL_PREFIX})
   message(STATUS "Dependency install directory set to: $ENV{INSTALL_PREFIX}")
   list(APPEND CMAKE_PREFIX_PATH "$ENV{INSTALL_PREFIX}")
-  # Allow installed package headers to be picked up before brew/system package
-  # headers
-  include_directories(BEFORE "$ENV{INSTALL_PREFIX}/include")
 endif()
 
 list(PREPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/CMake"