diff --git a/packages/plugin-expo-eas-sourcemaps/lib/bugsnag-expo-xcode.sh b/packages/plugin-expo-eas-sourcemaps/lib/bugsnag-expo-xcode.sh
index 33457119..60923bda 100755
--- a/packages/plugin-expo-eas-sourcemaps/lib/bugsnag-expo-xcode.sh
+++ b/packages/plugin-expo-eas-sourcemaps/lib/bugsnag-expo-xcode.sh
@@ -60,4 +60,11 @@ if [ ! -z "$ENDPOINT" ]; then
   ARGS+=("$ENDPOINT")
 fi
 
-../node_modules/.bin/bugsnag-source-maps upload-react-native "${ARGS[@]}"
+# Make sure that node binary exists
+source `$NODE_BINARY --print "require('path').dirname(require.resolve('react-native/package.json')) + '/scripts/node-binary.sh'"`
+
+# Retrieve the expo node binary
+BUGSNAG_EXPO_NODE_BINARY=$($NODE_BINARY --print "require('path').dirname(require.resolve('@bugsnag/source-maps/package.json'))")
+
+# Start upload the source maps to bugsnag
+$BUGSNAG_EXPO_NODE_BINARY upload-react-native "${ARGS[@]}"
\ No newline at end of file
diff --git a/packages/plugin-expo-eas-sourcemaps/lib/bugsnag-xcode-build-phase b/packages/plugin-expo-eas-sourcemaps/lib/bugsnag-xcode-build-phase
new file mode 100644
index 00000000..8b690e25
--- /dev/null
+++ b/packages/plugin-expo-eas-sourcemaps/lib/bugsnag-xcode-build-phase
@@ -0,0 +1,8 @@
+if [[ -f "$PODS_ROOT/../.xcode.env" ]]; then
+    source "$PODS_ROOT/../.xcode.env"
+fi
+if [[ -f "$PODS_ROOT/../.xcode.env.local" ]]; then
+    source "$PODS_ROOT/../.xcode.env.local"
+fi
+
+SOURCE_MAP="$TMPDIR/$(md5 -qs "$CONFIGURATION_BUILD_DIR")-main.jsbundle.map" `$NODE_BINARY --print "require('path').dirname(require.resolve('@bugsnag/plugin-expo-eas-sourcemaps/package.json')) + '/lib/bugsnag-expo-xcode.sh'"`
\ No newline at end of file
diff --git a/packages/plugin-expo-eas-sourcemaps/src/ios.js b/packages/plugin-expo-eas-sourcemaps/src/ios.js
index e18e9c86..989a67c5 100644
--- a/packages/plugin-expo-eas-sourcemaps/src/ios.js
+++ b/packages/plugin-expo-eas-sourcemaps/src/ios.js
@@ -2,6 +2,8 @@ const {
   withInfoPlist,
   withXcodeProject
 } = require('@expo/config-plugins')
+const { readFileSync } = require('fs');
+const { dirname, join } = require('path');
 
 const buildPhaseName = 'PBXShellScriptBuildPhase'
 const buildPhaseComment = 'Bundle React Native code and images'
@@ -19,19 +21,7 @@ function withIosPlugin (config, onPremConfig) {
   config = withXcodeProject(config, config => {
     const xcodeProject = config.modResults
 
-    // 02. Update react native bundle phase with sourcemap filepath
-    const bundleReactNativePhase = xcodeProject.pbxItemByComment(buildPhaseComment, buildPhaseName)
-
-    const initialScript = bundleReactNativePhase.shellScript
-
-    const additionalExports = '"export EXTRA_PACKAGER_ARGS=\\"--sourcemap-output $TMPDIR/$(md5 -qs \\"$CONFIGURATION_BUILD_DIR\\")-main.jsbundle.map\\"\\n'
-
-    const modifiedScript = additionalExports + initialScript.substr(1)
-
-    bundleReactNativePhase.shellScript = modifiedScript
-
-    // 03. Configure the new build phase
-    const shellScript = 'SOURCE_MAP="$TMPDIR/$(md5 -qs "$CONFIGURATION_BUILD_DIR")-main.jsbundle.map" ../node_modules/@bugsnag/plugin-expo-eas-sourcemaps/lib/bugsnag-expo-xcode.sh'
+    const shellScript = readFileSync(join(__dirname, '../lib/bugsnag-xcode-build-phase'), 'utf8')
 
     xcodeProject.addBuildPhase([], buildPhaseName, 'Upload source maps to Bugsnag', null, {
       shellPath: '/bin/sh',