diff --git a/package.json b/package.json
index 85d6682..3f9c262 100644
--- a/package.json
+++ b/package.json
@@ -3,8 +3,11 @@
   "version": "3.0.0",
   "description": "",
   "main": "index.js",
+  "//": "If you add or change the names of destinations in screeps.json, make sure you update these scripts to reflect the changes",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "push-main": "rollup -c --dest main",
+    "push-sim": "rollup -c --dest sim",
+    "push-pserver": "rollup -c --dest pserver"
   },
   "repository": {
     "type": "git",
diff --git a/rollup.config.js b/rollup.config.js
index d582e94..2e45137 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -6,6 +6,16 @@ import commonjs from "rollup-plugin-commonjs";
 import screeps from "rollup-plugin-screeps";
 import typescript from "rollup-plugin-typescript2";
 
+const config = require("./screeps");
+
+let cfg;
+const i = process.argv.indexOf("--dest") + 1;
+if (i == 0) {
+  console.log("No destination specified - code will be compiled but not uploaded");
+} else if (i >= process.argv.length || (cfg = config[process.argv[i]]) == null) {
+  throw new Error("Invalid upload destination");
+}
+
 export default {
   input: "src/main.ts",
   output: {
@@ -20,6 +30,6 @@ export default {
     resolve(),
     commonjs(),
     typescript({tsconfig: "./tsconfig.json"}),
-    screeps({configFile: "./screeps.json"})
+    screeps({config: cfg, dryRun: cfg == null})
   ]
 }
diff --git a/screeps.sample.json b/screeps.sample.json
index 3faceb0..94be95b 100644
--- a/screeps.sample.json
+++ b/screeps.sample.json
@@ -1,9 +1,29 @@
 {
-  "email": "you@provider.tld",
-  "password": "Password",
-  "protocol": "https",
-  "hostname": "screeps.com",
-  "port": 443,
-  "path": "/",
-  "branch": "auto"
+  "main": {
+    "email": "you@provider.tld",
+    "password": "Password",
+    "protocol": "https",
+    "hostname": "screeps.com",
+    "port": 443,
+    "path": "/",
+    "branch": "main"
+  },
+  "sim": {
+    "email": "you@provider.tld",
+    "password": "Password",
+    "protocol": "https",
+    "hostname": "screeps.com",
+    "port": 443,
+    "path": "/",
+    "branch": "sim"
+  },
+  "pserver": {
+    "email": "username",
+    "password": "Password",
+    "protocol": "http",
+    "hostname": "1.2.3.4",
+    "port": 21025,
+    "path": "/",
+    "branch": "main"
+  }
 }