diff --git a/src/determine-dependencies.js b/src/determine-dependencies.js
index ad6be07..204473b 100644
--- a/src/determine-dependencies.js
+++ b/src/determine-dependencies.js
@@ -79,6 +79,11 @@ module.exports = {
 
         await new Promise(resolve => {
           const classesInPhp = childProcess.spawn('php-classes.phar', [], options);
+          classesInPhp.on('error', error => {
+            if (error.code === 'ENOENT') {
+              console.log('Error: Missing `php-classes.phar`. Please see the README for install directions.');
+            }
+          });
           classesInPhp.on('close', status => resolve());
 
           // Pipe file contents to php-classes.phar separated by a zero byte
diff --git a/src/make/mageos-release.js b/src/make/mageos-release.js
index 1bd8b3f..c9f1fbd 100644
--- a/src/make/mageos-release.js
+++ b/src/make/mageos-release.js
@@ -37,6 +37,7 @@ Options:
   --mageosRelease=   Target Mage-OS release version
   --releaseRefsFile= JS file exporting a map with the git repo refs to use for the release
   --upstreamRelease= Upstream Magento Open Source release to use for package compatibility
+  --skipHistory      Skip rebuilding of historic releases
 `);
   process.exit(1);
 }
diff --git a/src/release-build-tools.js b/src/release-build-tools.js
index 228d13a..5a58718 100644
--- a/src/release-build-tools.js
+++ b/src/release-build-tools.js
@@ -208,6 +208,11 @@ async function buildMageOsProductCommunityEditionMetapackage(releaseVersion, ins
       [`${vendor}/product-community-edition`]: [
         (composerConfig) => {
           updateComposerConfigFromMagentoToMageOs(composerConfig, releaseVersion, replaceVersionMap, vendor)
+
+          // Add upstreamRelease to composer extra data for reference
+          composerConfig.extra = composerConfig.extra || {};
+          composerConfig.extra.magento_version = replaceVersionMap['replaceVersionMap']['magento/product-community-edition'];
+
           return composerConfig
         }
       ]