diff --git a/docker/Dockerfile.fluke b/docker/Dockerfile.fluke
index 7a37e06..a227e9f 100644
--- a/docker/Dockerfile.fluke
+++ b/docker/Dockerfile.fluke
@@ -39,7 +39,8 @@ RUN set -ex \
 	&& apk update && apk add --no-cache --virtual .ruby-builddeps \
 		coreutils \
 		linux-headers \
-		build-base
+		build-base \
+		libxml2
 
 ENV RUBYGEMS_VERSION 2.6.10
 RUN gem update --system "$RUBYGEMS_VERSION"