HIPNV_DIR is /usr (part of dev-libs/hipother).
Installing from there results in file collision.

Bug: https://bugs.gentoo.org/966306
--- a/hipamd/packaging/CMakeLists.txt
+++ b/hipamd/packaging/CMakeLists.txt
@@ -106,10 +106,6 @@ endforeach()
 install(DIRECTORY ${HIP_COMMON_DIR}/include DESTINATION . COMPONENT dev)
 install(DIRECTORY ${hip_SOURCE_DIR}/include/hip/amd_detail
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/hip COMPONENT dev)
-if(DEFINED HIPNV_DIR)
-    install(DIRECTORY ${HIPNV_DIR}/include/hip/nvidia_detail
-        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/hip COMPONENT dev)
-endif()
 if(HIP_PLATFORM STREQUAL "amd" )
 install(FILES ${CMAKE_BINARY_DIR}/hipamd/include/hip/amd_detail/hip_prof_str.h
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/hip/amd_detail COMPONENT dev)
--- a/hipamd/CMakeLists.txt
+++ b/hipamd/CMakeLists.txt
@@ -398,9 +398,6 @@ if(NOT ${INSTALL_SOURCE} EQUAL 0)
     endif()
 
     install(DIRECTORY include DESTINATION .)
-    if(DEFINED HIPNV_DIR)
-        install(DIRECTORY ${HIPNV_DIR}/include/hip/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/hip/)
-    endif()
     install(DIRECTORY ${HIP_COMMON_INCLUDE_DIR}/hip/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/hip/)
     if(WIN32)
       install(DIRECTORY ${HIP_COMMON_DIR}/cmake DESTINATION .)