Index: build/assemble-source-from-google.sh
==================================================================
--- build/assemble-source-from-google.sh
+++ build/assemble-source-from-google.sh
@@ -17,19 +17,31 @@
 
 # Build the libpcsc we need
 function assemblePCSC() {
 	local version url pkg sha256
 	local archive workdir
+	local patchfile
 
 	pkg='google-chrome-smart-card-apps'
 	version='20160317'
 	sha256='a144a81be9fe72eb7698a7dc0c1aba6425220551cca432ba7e58984422a7cf46'
 
 	archive="archive/${pkg}-${version}-nobinaries.zip"
 	workdir="workdir-${RANDOM}${RANDOM}${RANDOM}${RANDOM}.build"
+	patchdir="patches"
 
 	extract "${archive}" "${workdir}" || return 1
+
+	for patchfile in "${patchdir}"/*.diff; do
+		if [ ! -f "${patchfile}" ]; then
+			continue
+		fi
+		(
+			cd "${workdir}" || exit 1
+			patch -p1 --batch
+		) < "${patchfile}"
+	done
 
 	(
 		cd "${workdir}" || exit 1
 
 		# Copy out PC/SC headers for later use

ADDED   patches/google-chrome-smart-card-apps-20160317-nobinaries-fixderef.diff
Index: patches/google-chrome-smart-card-apps-20160317-nobinaries-fixderef.diff
==================================================================
--- patches/google-chrome-smart-card-apps-20160317-nobinaries-fixderef.diff
+++ patches/google-chrome-smart-card-apps-20160317-nobinaries-fixderef.diff
@@ -0,0 +1,12 @@
+diff -uNr google-chrome-smart-card-apps-20160317-nobinaries.orig/common/js/src/messaging/port-message-channel.js google-chrome-smart-card-apps-20160317-nobinaries-fixderef/common/js/src/messaging/port-message-channel.js
+--- google-chrome-smart-card-apps-20160317-nobinaries.orig/common/js/src/messaging/port-message-channel.js	2016-03-11 09:26:42.000000000 -0600
++++ google-chrome-smart-card-apps-20160317-nobinaries-fixderef/common/js/src/messaging/port-message-channel.js	2019-01-30 11:13:15.451487478 -0600
+@@ -127,6 +127,8 @@
+   if (!goog.object.containsKey(port, 'sender'))
+     return null;
+   var sender = port['sender'];
++  if (!goog.isDef(sender))
++    return null;
+   GSC.Logging.checkWithLogger(this.logger, goog.isObject(sender));
+   if (!goog.object.containsKey(sender, 'id'))
+     return null;