diff --git a/app/bin/build.js b/app/bin/build.js
index ebdb997..fbb7191 100644
--- a/app/bin/build.js
+++ b/app/bin/build.js
@@ -98,6 +98,8 @@ async function buildInstaller (platform) {
             const installerPath = path.join(BUILD_DIR_PATH, installerName);
             const componentPath = path.join(BUILD_DIR_PATH, componentName);
 
+            const packagingDir = path.join(__dirname, "../packaging/macos/");
+
             // Create pkgbuild root
             const rootPath = path.join(BUILD_DIR_PATH, "root");
             const rootExecutablePath = path.join(rootPath
@@ -120,11 +122,12 @@ async function buildInstaller (platform) {
                 `pkgbuild --root ${rootPath} `
                        + `--identifier "tf.matt.fx_cast_bridge" `
                        + `--version "0.0.1" `
+                       + `--scripts ${path.join(packagingDir, "scripts")} `
                        + `${componentPath}`
               , { shell: true });
 
             // Distribution XML file
-            const distFilePath = path.join(__dirname, "../distribution.xml");
+            const distFilePath = path.join(packagingDir, "distribution.xml");
 
             // Build installer package
             spawnSync(
diff --git a/app/distribution.xml b/app/packaging/macos/distribution.xml
similarity index 100%
rename from app/distribution.xml
rename to app/packaging/macos/distribution.xml
diff --git a/app/packaging/macos/scripts/postinstall b/app/packaging/macos/scripts/postinstall
new file mode 100755
index 0000000..7c8aa35
--- /dev/null
+++ b/app/packaging/macos/scripts/postinstall
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+if [ "$2" != "/" ]
+then
+	manifestPath=$2"/Library/Application Support/Mozilla/NativeMessagingHosts/fx_cast_bridge.json"
+	sed -i.bak 's,"path": "/Library,"path": "'$2'/Library,g' "$manifestPath"
+	rm  "$manifestPath.bak"
+fi
+
+exit 0