diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 764a9de..f1a189f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -22,12 +22,6 @@ jobs:
       - name: Show Swift version
         run: swift --version
 
-      - name: Install libmp3lame
-        run: brew install lame pkg-config
-
-      - name: Verify pkg-config sees mp3lame
-        run: pkg-config --libs mp3lame
-
       - name: Build
         run: swift build -c ${{ matrix.config }}
 
diff --git a/README.md b/README.md
index 7f8346b..492e57b 100644
--- a/README.md
+++ b/README.md
@@ -376,10 +376,9 @@ and the helper will dyld-resolve `LiveAudioServerCore` out of
 - macOS 14 (Sonoma) or later
 - Xcode 15.4+ / Swift 5.10+ (uses the [Swift Testing](https://github.com/apple/swift-testing) framework for unit tests)
 
-No external package manager (Homebrew/MacPorts) required — MP3/AAC encoding
-comes from the [PipelineHelpers](https://github.com/dsward2/PipelineHelpers)
-package's `AudioEncoders` library, which SwiftPM fetches automatically and
-which vendors `libmp3lame` as a prebuilt XCFramework itself.
+No external package manager (Homebrew/MacPorts) required — `libmp3lame` is
+vendored as a prebuilt static XCFramework (`Frameworks/Mp3Lame.xcframework`)
+and AAC uses the system AudioToolbox framework.
 
 ```bash
 cd LiveAudioServer