diff --git a/ports/proj4/portfile.cmake b/ports/proj4/portfile.cmake
index bc4e66fcdd..c6acc6cc82 100644
--- a/ports/proj4/portfile.cmake
+++ b/ports/proj4/portfile.cmake
@@ -59,12 +59,14 @@ string(REPLACE "set(_IMPORT_PREFIX \"${CURRENT_PACKAGES_DIR}\")"
 )
 file(WRITE ${CURRENT_PACKAGES_DIR}/share/proj4/proj4-targets.cmake "${_contents}")
 
+if(WIN32)
 if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "release")
     file(RENAME ${CURRENT_PACKAGES_DIR}/lib/proj_4_9.lib  ${CURRENT_PACKAGES_DIR}/lib/proj.lib)
 endif()
 if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "debug")
     file(RENAME ${CURRENT_PACKAGES_DIR}/debug/lib/proj_4_9_d.lib  ${CURRENT_PACKAGES_DIR}/debug/lib/projd.lib)
 endif()
+endif()
 
 # Remove duplicate headers installed from debug build
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)