diff --git a/makeDockerfile.ts b/makeDockerfile.ts
index 7843d988..9ebf86e0 100755
--- a/makeDockerfile.ts
+++ b/makeDockerfile.ts
@@ -96,6 +96,8 @@ COPY --link --chmod=755 ./proposals/${proposalIdentifier}:${proposalName} /usr/s
 # install using global cache
 RUN --mount=type=cache,target=/root/.yarn \
   cd /usr/src/upgrade-test-scripts/lib/ \
+  && corepack enable \
+  && yarn --version \
   && yarn install \
   && cd /usr/src/proposals/${proposalIdentifier}:${proposalName} \
   && test -n "yarn.lock" && yarn install --frozen-lockfile --production
@@ -126,6 +128,8 @@ COPY --link ./upgrade-test-scripts/lib /usr/src/upgrade-test-scripts/lib
 # install using global cache
 RUN --mount=type=cache,target=/root/.yarn \
   cd /usr/src/upgrade-test-scripts/lib/ \
+  && corepack enable \
+  && yarn --version \
   && yarn install \
   && cd /usr/src/proposals/${proposalIdentifier}:${proposalName} \
   && test -n "yarn.lock" && yarn install --frozen-lockfile --production
@@ -152,6 +156,8 @@ FROM use-${proposalName} as test-${proposalName}
 # install using global cache
 RUN --mount=type=cache,target=/root/.yarn \
   cd /usr/src/upgrade-test-scripts/lib/ \
+  && corepack enable \
+  && yarn --version \
   && yarn install \
   && cd /usr/src/proposals/${proposalIdentifier}:${proposalName} \
   && test -n "yarn.lock" && yarn install --frozen-lockfile --production