diff --git a/images/builder/Earthfile b/images/builder/Earthfile
index b7025b4..f4e92d3 100644
--- a/images/builder/Earthfile
+++ b/images/builder/Earthfile
@@ -2,6 +2,6 @@
 
 image:
   FROM ../base+image
-  DO ../+APT_INSTALL --packages "build-essential git python3-dev python3-pip python3-venv"
+  DO ../+APT_INSTALL --PACKAGES "build-essential git python3-dev python3-pip python3-venv"
   ARG POETRY_VERSION=1.4.2
   RUN pip3 install --no-cache-dir poetry==${POETRY_VERSION}