diff --git a/builds/cedar-14.Dockerfile b/builds/cedar-14.Dockerfile
index ea11542..5d1ae59 100644
--- a/builds/cedar-14.Dockerfile
+++ b/builds/cedar-14.Dockerfile
@@ -7,7 +7,7 @@ ENV WORKSPACE_DIR="/app/builds" \
     DEBIAN_FRONTEND=noninteractive \
     STACK="cedar-14"
 
-RUN apt-get update && apt-get install -y python-pip && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y python-pip libsqlite3-dev realpath && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt /app/
 RUN pip install -r /app/requirements.txt
diff --git a/builds/heroku-16.Dockerfile b/builds/heroku-16.Dockerfile
index 324042e..6b0728e 100644
--- a/builds/heroku-16.Dockerfile
+++ b/builds/heroku-16.Dockerfile
@@ -7,7 +7,7 @@ ENV WORKSPACE_DIR="/app/builds" \
     DEBIAN_FRONTEND=noninteractive \
     STACK="heroku-16"
 
-RUN apt-get update && apt-get install -y python-pip && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y python-pip libsqlite3-dev && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt /app/
 RUN pip install --disable-pip-version-check --no-cache-dir -r /app/requirements.txt
diff --git a/builds/heroku-18.Dockerfile b/builds/heroku-18.Dockerfile
index 7f0f942..80ad34d 100644
--- a/builds/heroku-18.Dockerfile
+++ b/builds/heroku-18.Dockerfile
@@ -7,7 +7,7 @@ ENV WORKSPACE_DIR="/app/builds" \
     DEBIAN_FRONTEND=noninteractive \
     STACK="heroku-18"
 
-RUN apt-get update && apt-get install --no-install-recommends -y python-pip-whl=9.0.1-2 python-pip=9.0.1-2 python-setuptools python-wheel && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install --no-install-recommends -y python-pip-whl=9.0.1-2 python-pip=9.0.1-2 python-setuptools python-wheel libsqlite3-dev && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt /app/
 RUN pip install --disable-pip-version-check --no-cache-dir -r /app/requirements.txt
diff --git a/builds/runtimes/python3 b/builds/runtimes/python3
index 5578cec..1b6d152 100755
--- a/builds/runtimes/python3
+++ b/builds/runtimes/python3
@@ -16,20 +16,6 @@ python_version=${BASE^} # this gives us only the filename with version number
 version_number=$(echo "$python_version" | cut -d- -f2) # this returns just X.X.X
 dep_url=https://python.org/ftp/python/${version_number}/${python_version}.tgz
 
-# Install SQLITE, as headers are not available out of the box on the stack
-apt-get install libsqlite3-dev
-needed=( libsqlite3-dev )
-if [[ $STACK == "cedar-14" ]]; then
-	needed+=( realpath )
-
-# Check whether our packages are missing on the stack
-missing=$(comm -1 -3 <(dpkg-query -W -f '${package}\n' | sort) <(IFS=$'\n'; echo "${needed[*]}" | sort))
-if [[ "$missing" ]]; then
-    # install missing and needed packages
-	apt-get update -qq || { echo "Failed to 'apt-get update'. You must build this formula using Docker."; exit 1; }
-	apt-get install -q -y $missing
-fi
-
 curl -L "${dep_url}" | tar xz -C "${OUT_PREFIX}"
 mv "${OUT_PREFIX}/${python_version}" src
 cd src