diff --git a/circleci/images/failtester/Dockerfile b/circleci/images/failtester/Dockerfile
index 23f9691..65d5450 100644
--- a/circleci/images/failtester/Dockerfile
+++ b/circleci/images/failtester/Dockerfile
@@ -21,6 +21,7 @@ RUN apt-get update \
     libcurl4 \
     libcurl4-openssl-dev \
     libicu-dev \
+    libkrb5-dev \
     liblz4-1 \
     liblz4-dev \
     libreadline-dev \
diff --git a/circleci/images/pgupgradetester/Dockerfile b/circleci/images/pgupgradetester/Dockerfile
index c78c11f..a56140b 100644
--- a/circleci/images/pgupgradetester/Dockerfile
+++ b/circleci/images/pgupgradetester/Dockerfile
@@ -21,6 +21,7 @@ RUN apt-get update \
     libcurl4 \
     libcurl4-openssl-dev \
     libicu-dev \
+    libkrb5-dev \
     liblz4-1 \
     liblz4-dev \
     libreadline-dev \
diff --git a/circleci/images/stylechecker/Dockerfile b/circleci/images/stylechecker/Dockerfile
index a71d71a..addf05e 100644
--- a/circleci/images/stylechecker/Dockerfile
+++ b/circleci/images/stylechecker/Dockerfile
@@ -38,5 +38,5 @@ RUN apk add --no-cache --virtual installdeps \
   && make install \
   && cd ../.. \
   && rm -rf uncrustify-uncrustify-0.68.1/ \
-  && pip3 install -Ir /tmp/etc/requirements.txt \
+  && pip3 install -Ir /tmp/etc/requirements.txt --break-system-packages \
   && apk del installdeps