diff --git a/resources/linux/debian/postinst.template b/resources/linux/debian/postinst.template
index c440312f331..9c49ab29457 100755
--- a/resources/linux/debian/postinst.template
+++ b/resources/linux/debian/postinst.template
@@ -36,9 +36,27 @@ if [ "@@NAME@@" != "code-oss" ]; then
 	eval $(apt-config shell APT_TRUSTED_PARTS Dir::Etc::trustedparts/d)
 	CODE_TRUSTED_PART=${APT_TRUSTED_PARTS}microsoft.gpg
 
-	# Sourced from https://packages.microsoft.com/keys/microsoft.asc
-	if [ ! -f $CODE_TRUSTED_PART ]; then
-		echo "-----BEGIN PGP PUBLIC KEY BLOCK-----
+	# Install repository source list
+	WRITE_SOURCE=0
+	if [ ! -f $CODE_SOURCE_PART ] && [ ! -f /etc/rpi-issue ]; then
+		# Write source list if it does not exist and we're not running on Raspberry Pi OS
+		WRITE_SOURCE=1
+	elif grep -Eq "http:\/\/packages\.microsoft\.com\/repos\/vscode" $CODE_SOURCE_PART; then
+		# Migrate from old repository
+		WRITE_SOURCE=1
+	elif grep -q "# disabled on upgrade to" $CODE_SOURCE_PART; then
+		# Write source list if it was disabled by OS upgrade
+		WRITE_SOURCE=1
+	fi
+
+	if [ "$WRITE_SOURCE" -eq "1" ]; then
+		echo "### THIS FILE IS AUTOMATICALLY CONFIGURED ###
+# You may comment out this entry, but any other modifications may be lost.
+deb [arch=amd64,arm64,armhf] http://packages.microsoft.com/repos/code stable main" > $CODE_SOURCE_PART
+
+		# Sourced from https://packages.microsoft.com/keys/microsoft.asc
+		if [ ! -f $CODE_TRUSTED_PART ]; then
+			echo "-----BEGIN PGP PUBLIC KEY BLOCK-----
 Version: GnuPG v1.4.7 (GNU/Linux)
 
 mQENBFYxWIwBCADAKoZhZlJxGNGWzqV+1OG1xiQeoowKhssGAKvd+buXCGISZJwT
@@ -57,25 +75,7 @@ XdNgj4Jd2/g6T9InmWT0hASljur+dJnzNiNCkbn9KbX7J/qK1IbR8y560yRmFsU+
 NdCFTW7wY0Fb1fWJ+/KTsC4=
 =J6gs
 -----END PGP PUBLIC KEY BLOCK-----
-" | gpg --dearmor > microsoft.gpg
-		mv microsoft.gpg $CODE_TRUSTED_PART
-	fi
-
-	# Install repository source list
-	WRITE_SOURCE=0
-	if [ ! -f $CODE_SOURCE_PART ]; then
-		# Write source list if it does not exist
-		WRITE_SOURCE=1
-	elif grep -Eq "http:\/\/packages\.microsoft\.com\/repos\/vscode" $CODE_SOURCE_PART; then
-		# Migrate from old repository
-		WRITE_SOURCE=1
-	elif grep -q "# disabled on upgrade to" $CODE_SOURCE_PART; then
-		# Write source list if it was disabled by OS upgrade
-		WRITE_SOURCE=1
-	fi
-	if [ "$WRITE_SOURCE" -eq "1" ]; then
-		echo "### THIS FILE IS AUTOMATICALLY CONFIGURED ###
-# You may comment out this entry, but any other modifications may be lost.
-deb [arch=amd64,arm64,armhf] http://packages.microsoft.com/repos/code stable main" > $CODE_SOURCE_PART
+" | gpg --dearmor > $CODE_TRUSTED_PART
+		fi
 	fi
 fi