Merge pull request #31 from xmake-io/dev

Update xmake.lua

packages/n/nana/xmake.lua

@@ -19,7 +19,11 @@ package("nana")
     end
 
     on_install("linux", "windows", function (package)
-        import("package.tools.cmake").install(package, {"-DNANA_CMAKE_NANA_FILESYSTEM_FORCE=ON", "-DNANA_CMAKE_ENABLE_JPEG=OFF", "-DNANA_CMAKE_ENABLE_PNG=OFF"})
+        local configs = {"-DNANA_CMAKE_ENABLE_JPEG=OFF", "-DNANA_CMAKE_ENABLE_PNG=OFF"}
+        if is_plat("linux") then
+            table.insert(configs, "-DNANA_CMAKE_NANA_FILESYSTEM_FORCE=ON")
+        end
+        import("package.tools.cmake").install(package, configs)
     end)
 
     on_test(function (package)