diff --git a/packages/l/libnest2d/port/xmake.lua b/packages/l/libnest2d/port/xmake.lua
index ff3fc6f28..a833418ba 100644
--- a/packages/l/libnest2d/port/xmake.lua
+++ b/packages/l/libnest2d/port/xmake.lua
@@ -13,3 +13,7 @@ target("libnest2d")
     add_defines("LIBNEST2D_GEOMETRIES_clipper", "LIBNEST2D_OPTIMIZER_nlopt")
 
     add_includedirs("include", {public = true})
+
+    if is_plat("windows") and is_kind("shared") then
+        add_rules("utils.symbols.export_all", {export_classes = true})
+    end
diff --git a/packages/l/libnest2d/xmake.lua b/packages/l/libnest2d/xmake.lua
index ee309cf32..e76250889 100644
--- a/packages/l/libnest2d/xmake.lua
+++ b/packages/l/libnest2d/xmake.lua
@@ -6,17 +6,13 @@ package("libnest2d")
     add_urls("https://github.com/tamasmeszaros/libnest2d.git")
     add_versions("2022.11.16", "663daa69e1d7478669f714218e27681edbc96640")
 
-    add_deps("nlopt", "polyclipping", "boost")
+    add_defines("LIBNEST2D_GEOMETRIES_clipper", "LIBNEST2D_OPTIMIZER_nlopt")
 
-    on_load(function (package)
-        package:add("defines", "LIBNEST2D_GEOMETRIES_clipper")
-        package:add("defines", "LIBNEST2D_OPTIMIZER_nlopt")
-    end)
+    add_deps("nlopt", "polyclipping", "boost")
 
     on_install("linux", "windows", "macosx", function (package)
         os.cp(path.join(package:scriptdir(), "port", "xmake.lua"), "xmake.lua")
-        local configs = {}
-        import("package.tools.xmake").install(package, configs)
+        import("package.tools.xmake").install(package)
     end)
 
     on_test(function (package)
diff --git a/packages/p/polyclipping/xmake.lua b/packages/p/polyclipping/xmake.lua
index 0017b9fec..04614a366 100644
--- a/packages/p/polyclipping/xmake.lua
+++ b/packages/p/polyclipping/xmake.lua
@@ -7,7 +7,6 @@ package("polyclipping")
     add_versions("6.4.2", "a14320d82194807c4480ce59c98aa71cd4175a5156645c4e2b3edd330b930627")
 
     on_install(function (package)
-        local configs = {}
         io.writefile("xmake.lua", [[
             add_rules("mode.release", "mode.debug")
             target("polyclipping")
@@ -15,8 +14,11 @@ package("polyclipping")
                 set_languages("cxx11")
                 add_files("cpp/*.cpp")
                 add_headerfiles("cpp/(*.hpp)")
+                if is_plat("windows") and is_kind("shared") then
+                    add_rules("utils.symbols.export_all", {export_classes = true})
+                end
         ]])
-        import("package.tools.xmake").install(package, configs)
+        import("package.tools.xmake").install(package)
     end)
 
     on_test(function (package)