diff --git a/build-portable-artifacts.mjs b/build-portable-artifacts.mjs
index 80a5c2c..18f2fa0 100644
--- a/build-portable-artifacts.mjs
+++ b/build-portable-artifacts.mjs
@@ -43,6 +43,8 @@ const coreURL = coreFile ? compiler.contentArtifactUrl(coreFile) : null;
 const coreServer = path.join(config.sharedRuntime, "core.mjs");
 await fs.mkdir(path.join(output, "share/quixos/generated"), { recursive: true });
 const portable = config.portable;
+for (const target of Object.keys(portable?.entries ?? {}))
+  if (!["browser", "server"].includes(target)) throw Error(`Unsupported portable entry target ${target}`);
 for (const settings of [portable, config.remote].filter(Boolean))
   if (!/^[$A-Z_a-z][$\w]*$/.test(settings.registryExport))
     throw Error("Registry export must be a JavaScript identifier");
@@ -82,7 +84,7 @@ for (const { target, mode, settings } of builds) {
   await fs.writeFile(path.join(work, bindingPath), source);
   generated.set(mode, { file: path.join(work, bindingPath), source });
   await fs.writeFile(path.join(output, "share/quixos/generated", `${mode}.ts`), source);
-  const entry = relative(settings.entry);
+  const entry = relative(settings.entries?.[target] ?? settings.entry);
   execFileSync(
     config.node,
     [
diff --git a/portable-artifacts.nix b/portable-artifacts.nix
index 2fbe763..32102d8 100644
--- a/portable-artifacts.nix
+++ b/portable-artifacts.nix
@@ -33,6 +33,7 @@ let
         else
           {
             inherit (portable) entry;
+            entries = portable.entries or { };
             registryExport = portable.registryExport or "registry";
             bindingOutput = portable.bindingOutput or "src/gen/qx.ts";
             targets =