diff --git a/ports/py-pillow/portfile.cmake b/ports/py-pillow/portfile.cmake
index 0d63365..a83bef1 100755
--- a/ports/py-pillow/portfile.cmake
+++ b/ports/py-pillow/portfile.cmake
@@ -8,9 +8,11 @@ vcpkg_from_github(
 
 set(ENV{PKG_CONFIG} "${CURRENT_HOST_INSTALLED_DIR}/tools/pkgconf/pkgconf")
 set(ENV{PKG_CONFIG_PATH} "${CURRENT_INSTALLED_DIR}/lib/pkgconfig")
-set(ENV{INCLUDE} "${CURRENT_INSTALLED_DIR}/include;$ENV{INCLUDE}")
-set(ENV{INCLIB} "${CURRENT_INSTALLED_DIR}/lib;$ENV{INCLIB}")
-set(ENV{LIB} "${CURRENT_INSTALLED_DIR}/lib;$ENV{LIB}")
+if(VCPKG_TARGET_IS_WINDOWS)
+  set(ENV{INCLUDE} "${CURRENT_INSTALLED_DIR}/include;$ENV{INCLUDE}")
+  set(ENV{INCLIB} "${CURRENT_INSTALLED_DIR}/lib;$ENV{INCLIB}")
+  set(ENV{LIB} "${CURRENT_INSTALLED_DIR}/lib;$ENV{LIB}")
+endif()
 
 vcpkg_python_build_and_install_wheel(
   SOURCE_PATH "${SOURCE_PATH}"