diff --git a/bot.json b/bot.json
index a43eb55..60f4c52 100644
--- a/bot.json
+++ b/bot.json
@@ -5,8 +5,16 @@
   },
   "environments": {
     "default": {
-      "warmup": 4,
-      "timeout": 3000,
+      "warmup": 3,
+      "timeout": 4000,
+      "isolated": false,
+      "path": "docker/runner-default",
+      "overrides": ["meta.json_reporter.binary_files = true"]
+    },
+    "isolated": {
+      "warmup": 2,
+      "timeout": 30000,
+      "isolated": true,
       "path": "docker/runner-default",
       "overrides": ["meta.json_reporter.binary_files = true"]
     }
diff --git a/infra/cloud-config.yaml b/infra/cloud-config.yaml
index bdd38e8..b81bda9 100644
--- a/infra/cloud-config.yaml
+++ b/infra/cloud-config.yaml
@@ -56,10 +56,16 @@ write_files:
           "default": {
             "warmup": 3,
             "timeout": 4000,
+            "isolated": false,
             "path": "https://github.com/mcbeet/beet-bot.git#main:docker/runner-default",
-            "overrides": [
-              "meta.json_reporter.binary_files = true"
-            ]
+            "overrides": ["meta.json_reporter.binary_files = true"]
+          },
+          "isolated": {
+            "warmup": 2,
+            "timeout": 30000,
+            "isolated": true,
+            "path": "https://github.com/mcbeet/beet-bot.git#main:docker/runner-default",
+            "overrides": ["meta.json_reporter.binary_files = true"]
           }
         }
       }
diff --git a/packages/runner/src/build.ts b/packages/runner/src/build.ts
index 3f77078..348265b 100644
--- a/packages/runner/src/build.ts
+++ b/packages/runner/src/build.ts
@@ -26,12 +26,12 @@ export const createBuilder = ({ warmup, timeout, setup }: BuilderOptions): Build
 
     return new Promise<WorkerInfo>((resolve, reject) => {
       handle.on('spawn', () => {
-        console.log(`INFO: Successfully spawned worker #${handle.pid}`)
+        console.log(`INFO: Successfully spawned idle worker #${handle.pid}`)
         resolve({ handle, stop })
       })
 
       handle.on('error', (err) => {
-        console.log('WARN: Failed to spawn worker')
+        console.log('WARN: Failed to spawn idle worker')
         reject(err)
       })
     })
diff --git a/packages/runner/src/docker.ts b/packages/runner/src/docker.ts
index ebd77e5..b8d0b6b 100644
--- a/packages/runner/src/docker.ts
+++ b/packages/runner/src/docker.ts
@@ -14,7 +14,7 @@ export const deleteDockerBuilder = async (name: string) => {
   }
 }
 
-export const setupDockerBuilder = async (name: string, path: string, overrides: string[] = []) => {
+export const setupDockerBuilder = async (name: string, path: string, isolated: boolean, overrides: string[] = []) => {
   const tag = getDockerImageTag(name)
 
   try {
@@ -30,7 +30,7 @@ export const setupDockerBuilder = async (name: string, path: string, overrides:
     const container = `${tag}-${id}`
 
     const handle = execa('docker', [
-      'run', '--name', container, '--rm', '-i', tag,
+      'run', '--name', container, ...(isolated ? ['--network', 'none'] : []), '--rm', '-i', tag,
       'beet', '-p', '@beet/preset_stdin.yml', ...overrides.flatMap(override => ['-s', override]), 'build', '--json'
     ])
 
diff --git a/packages/runner/src/pool.ts b/packages/runner/src/pool.ts
index a650826..8e72e9b 100644
--- a/packages/runner/src/pool.ts
+++ b/packages/runner/src/pool.ts
@@ -9,6 +9,7 @@ export type PoolRunner = {
 export type EnvironmentOptions = {
   warmup: number
   timeout: number
+  isolated: boolean
   path: string
   overrides?: string[]
 }
@@ -17,7 +18,7 @@ export const createPoolRunner = (environments: Record<string, EnvironmentOptions
   const builders = new Map<string, Builder>()
 
   for (const name in environments) {
-    const { warmup, timeout, path, overrides } = environments[name]
+    const { warmup, timeout, isolated, path, overrides } = environments[name]
     builders.set(name, createBuilder({
       warmup,
       timeout,
@@ -25,7 +26,7 @@ export const createPoolRunner = (environments: Record<string, EnvironmentOptions
         if (refresh) {
           await deleteDockerBuilder(name)
         }
-        return await setupDockerBuilder(name, path, overrides)
+        return await setupDockerBuilder(name, path, isolated, overrides)
       }
     }))
   }
@@ -44,6 +45,7 @@ export const createPoolRunner = (environments: Record<string, EnvironmentOptions
     const builder = builders.get(name)
 
     if (builder) {
+      console.log(`INFO: Trigger build in "${name}" environment`)
       return await builder.build(options)
     } else {
       throw new Error(`Invalid environment "${name}"`)