don't run prepare on yarn install...

BUILDING.md

@@ -22,7 +22,7 @@ When setting up your environment, make sure to install the following dependency
 We also need the requirements to build ExoPlayer's ffmpeg extension for Android, which should be covered by:
 - build-essential (make, etc.)
 
-More information on building ffmpeg can be found here (this is what the `prepare` script does):
+More information on building ffmpeg can be found here (this is what the `prepare-build` script does):
 
 https://github.com/google/ExoPlayer/tree/r2.11.4/extensions/ffmpeg
 
@@ -36,7 +36,7 @@ cd subtracks
 Install the yarn packages and prepare the ExoPlayer ffmpeg extension by running the yarn script:
 ```sh
 yarn install
-yarn prepare
+yarn prepare-build
 ```
 
 ### Debug

package.json

@@ -7,7 +7,7 @@
     "android": "react-native run-android",
     "android:release": "./android/gradlew -p android assembleRelease -PsignReleaseWithDebug=true && adb install -r android/app/build/outputs/apk/release/app-release.apk && adb shell am start -n com.subtracks/.MainActivity",
     "start": "react-native start",
-    "prepare": "scripts/prepare-exoplayer-ffmpeg.sh",
+    "prepare-build": "scripts/prepare-exoplayer-ffmpeg.sh",
     "test": "jest",
     "lint": "eslint . --ext .js,.jsx,.ts,.tsx",
     "license:npm": "yarn licenses generate-disclaimer --production | grep -v '^info\\s\"\\?fsevents' > android/app/src/main/assets/licenses/npm.txt",