THRIFT-3907 Skip Docker image build on CI when unchanged
diff --git a/build/docker/ubuntu/Dockerfile b/build/docker/ubuntu/Dockerfile
index 2797a1c..7792aae 100644
--- a/build/docker/ubuntu/Dockerfile
+++ b/build/docker/ubuntu/Dockerfile
@@ -204,5 +204,5 @@
ENV THRIFT_ROOT /thrift
RUN mkdir -p $THRIFT_ROOT/src
-COPY scripts $THRIFT_ROOT
+COPY Dockerfile $THRIFT_ROOT/
WORKDIR $THRIFT_ROOT/src
diff --git a/build/docker/ubuntu/scripts/dpkg.sh b/build/docker/ubuntu/scripts/dpkg.sh
deleted file mode 100755
index 3ba0cd4..0000000
--- a/build/docker/ubuntu/scripts/dpkg.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/sh
-set -ev
-
-dpkg-buildpackage -tc -us -uc
-ls -al ..