diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 7678669b..72d28c4f 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -2,7 +2,7 @@ on:
   workflow_call:
     outputs:
       artifact:
-        description: The name of the uploaded image aretfact.
+        description: The name of the uploaded image artefact.
         value: ${{ jobs.build.outputs.artifact }}
       version:
         description: The package's version.
@@ -10,13 +10,18 @@ on:
 
 jobs:
   build:
-    name: Build snekbox-venv image
+    name: Build snekbox-integration image
     runs-on: ubuntu-latest
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5000:5000
     outputs:
       artifact: ${{ env.artifact }}
       version: ${{ steps.version.outputs.version }}
     env:
-      artifact: image_artifact_snekbox-venv
+      artifact: image_artifact_snekbox-integration
 
     steps:
       - name: Checkout code
@@ -38,6 +43,8 @@ jobs:
       # the builds. See https://github.com/docker/build-push-action
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          driver-opts: network=host
 
       - name: Log in to GitHub Container Registry
         uses: docker/login-action@v3
@@ -78,16 +85,30 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          push: false
+          push: true
           target: venv
           build-args: DEV=1
-          outputs: type=docker,dest=${{ env.artifact }}.tar
           cache-from: |
             ${{ steps.cache_config.outputs.cache_from }}
             ghcr.io/python-discord/snekbox-base:latest
             ghcr.io/python-discord/snekbox-venv:latest
           cache-to: ${{ steps.cache_config.outputs.cache_to }}
-          tags: ghcr.io/python-discord/snekbox-venv:${{ steps.version.outputs.version }}
+          tags: localhost:5000/local/snekbox-venv:${{ steps.version.outputs.version }}
+
+      - name: Build integration image for testing
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile.pydis
+          push: false
+          pull: false
+          outputs: type=docker,dest=${{ env.artifact }}.tar
+          build-args: SNEKBOX_IMAGE=localhost:5000/local/snekbox-venv:${{ steps.version.outputs.version }}
+          cache-from: |
+            ${{ steps.cache_config.outputs.cache_from }}
+            ghcr.io/python-discord/snekbox-venv:latest
+          cache-to: ${{ steps.cache_config.outputs.cache_to }}
+          tags: ghcr.io/python-discord/snekbox-integration:${{ steps.version.outputs.version }}
 
       # Make the image available as an artifact so other jobs will be able to
       # download it.
diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index 23c76e90..2dfb4a62 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -15,6 +15,11 @@ jobs:
   deploy:
     name: Build, push, & deploy
     runs-on: ubuntu-latest
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5000:5000
 
     steps:
       - name: Download image artifact
@@ -58,6 +63,21 @@ jobs:
           tags: |
             ghcr.io/python-discord/snekbox:latest
             ghcr.io/python-discord/snekbox:${{ inputs.version }}
+            localhost:5000/local/snekbox:${{ inputs.version }}
+
+      - name: Build PyDis final image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile.pydis
+          push: true
+          cache-from: |
+            ghcr.io/python-discord/snekbox:latest-pydis
+          build-args: SNEKBOX_IMAGE=localhost:5000/local/snekbox:${{ inputs.version }}
+          cache-to: type=inline
+          tags: |
+            ghcr.io/python-discord/snekbox:latest-pydis
+            ghcr.io/python-discord/snekbox:${{ inputs.version }}-pydis
 
       # Deploy to Kubernetes.
       - name: Install kubectl
@@ -74,7 +94,7 @@ jobs:
         with:
           namespace: snekbox
           manifests: deployment.yaml
-          images: 'ghcr.io/python-discord/snekbox:${{ inputs.version }}'
+          images: 'ghcr.io/python-discord/snekbox:${{ inputs.version }}-pydis'
 
       # Push the base image to GHCR, with an inline cache manifest.
       - name: Push base image
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index a7d66a16..74fffc07 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -34,7 +34,7 @@ jobs:
       - name: Run tests
         id: run_tests
         run: |
-          export IMAGE_SUFFIX='-venv:${{ inputs.version }}'
+          export IMAGE_SUFFIX='-integration:${{ inputs.version }}'
           docker compose run \
             --rm -T -e COVERAGE_DATAFILE=.coverage \
             --entrypoint coverage \
@@ -110,5 +110,5 @@ jobs:
       # This is to ensure that deployment won't fail at that step
       - name: Install eval deps
         run: |
-          export IMAGE_SUFFIX='-venv:${{ inputs.version }}'
+          export IMAGE_SUFFIX='-integration:${{ inputs.version }}'
           docker compose run --rm -T --entrypoint /bin/bash snekbox scripts/install_eval_deps.sh
diff --git a/Dockerfile b/Dockerfile
index 2c73bb7b..0c607d6d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,47 +16,9 @@ RUN git clone -b master --single-branch https://github.com/google/nsjail.git . \
     && git checkout dccf911fd2659e7b08ce9507c25b2b38ec2c5800
 RUN make
 
-# ------------------------------------------------------------------------------
-FROM buildpack-deps:bookworm AS builder-py-base
-
-ENV PYENV_ROOT=/pyenv \
-    PYTHON_CONFIGURE_OPTS='--disable-test-modules --enable-optimizations \
-        --with-lto --without-ensurepip'
-
-RUN apt-get -y update \
-    && apt-get install -y --no-install-recommends \
-        libxmlsec1-dev \
-        tk-dev \
-        lsb-release \
-        software-properties-common \
-        gnupg \
-    && rm -rf /var/lib/apt/lists/*
-
-RUN git clone -b v2.6.9 --depth 1 https://github.com/pyenv/pyenv.git $PYENV_ROOT
-
-COPY --link scripts/build_python.sh /
+FROM python:3.14-slim-bookworm AS base
 
-# ------------------------------------------------------------------------------
-FROM builder-py-base AS builder-py-3_13
-RUN /build_python.sh 3.13.8
-# ------------------------------------------------------------------------------
-FROM builder-py-base AS builder-py-3_14
-RUN /build_python.sh 3.14.0
-# ------------------------------------------------------------------------------
-FROM builder-py-base AS builder-py-3_14t
-RUN /build_python.sh 3.14.0t
-# ------------------------------------------------------------------------------
-FROM builder-py-base AS builder-py-3_14j
-
-# Following guidance from https://github.com/python/cpython/blob/main/Tools/jit/README.md
-RUN curl -o /tmp/llvm.sh https://apt.llvm.org/llvm.sh \
-    && chmod +x /tmp/llvm.sh \
-    && /tmp/llvm.sh 19 \
-    && rm /tmp/llvm.sh
-
-RUN /build_python.sh 3.14.0j
-# ------------------------------------------------------------------------------
-FROM python:3.13-slim-bookworm AS base
+RUN mkdir -p /snekbin/python/
 
 ENV PIP_DISABLE_PIP_VERSION_CHECK=1 \
     PIP_NO_CACHE_DIR=false
@@ -70,13 +32,10 @@ RUN apt-get -y update \
     && rm -rf /var/lib/apt/lists/*
 
 COPY --link --from=builder-nsjail /nsjail/nsjail /usr/sbin/
-COPY --link --from=builder-py-3_13 /snekbin/ /snekbin/
-COPY --link --from=builder-py-3_14 /snekbin/ /snekbin/
-COPY --link --from=builder-py-3_14t /snekbin/ /snekbin/
-COPY --link --from=builder-py-3_14j /snekbin/ /snekbin/
 
+# Snekbox defaults to using system Python unless additional versions are added.
 RUN chmod +x /usr/sbin/nsjail \
-    && ln -s /snekbin/python/3.14/ /snekbin/python/default
+    && ln -s /usr/local /snekbin/python/default
 
 # ------------------------------------------------------------------------------
 FROM base AS venv
@@ -97,7 +56,7 @@ RUN if [ -n "${DEV}" ]; \
     then \
         pip install -U -r requirements/coverage.pip \
         && export PYTHONUSERBASE=/snekbox/user_base \
-        && /snekbin/python/default/bin/python -m pip install --user numpy~=2.3.3; \
+        && /snekbin/python/default/bin/python -m pip install --user numpy~=2.3.4; \
     fi
 
 # At the end to avoid re-installing dependencies when only a config changes.
diff --git a/Dockerfile.pydis b/Dockerfile.pydis
new file mode 100644
index 00000000..46a51684
--- /dev/null
+++ b/Dockerfile.pydis
@@ -0,0 +1,14 @@
+# This is a custom additional build of Snekbox that includes multiple Python versions.
+
+# The Python versions are now pulled from pre-built images to reduce build time
+# and complexity. The images are built in the python-builds repository.
+
+ARG SNEKBOX_IMAGE=ghcr.io/python-discord/snekbox:latest
+FROM ${SNEKBOX_IMAGE}
+
+COPY --link --from=ghcr.io/python-discord/python-builds:3.13 /snekbin/ /snekbin/
+COPY --link --from=ghcr.io/python-discord/python-builds:3.14 /snekbin/ /snekbin/
+COPY --link --from=ghcr.io/python-discord/python-builds:3.14t /snekbin/ /snekbin/
+COPY --link --from=ghcr.io/python-discord/python-builds:3.14j /snekbin/ /snekbin/
+
+RUN rm /snekbin/python/default && ln -s /snekbin/python/3.14/ /snekbin/python/default
diff --git a/README.md b/README.md
index 52cc7f15..492c805f 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,24 @@ Name | Description
 `SNEKBOX_DEBUG` | Enable debug logging if set to a non-empty value.
 `SNEKBOX_SENTRY_DSN` | [Data Source Name] for Sentry. Sentry is disabled if left unset.
 
+### Additional Interpreters
+
+By default, snekbox will use and make available the system Python (the version used to run snekbox itself). Additional interpreters or binaries should be placed in `/snekbin/` which is mounted to the nsjail container.
+
+You can use the `executable_path` parameter in `POST` requests to `/eval` to select an interpreter, e.g.
+
+```js
+{
+  "executable_path": "/snekbin/python/3.14/bin/python",
+  // Rest of /eval body
+  ...
+}
+```
+
+The default interpreter is at `/snekbin/python/default/bin/python`, you can symlink `/snekbin/python/default` to another interpreter such as `/snekbin/python/3.14` to change this default.
+
+See [`Dockerfile.pydis`](Dockerfile.pydis) for an example using additional prebuilt interpreters and how to change the defaults.. This uses images built from [`python-discord/python-builds`](https://github.com/python-discord/python-builds).
+
 ## Third-party Packages
 
 By default, the Python interpreter has no access to any packages besides the  standard library. Even snekbox's own dependencies like Falcon and Gunicorn are not exposed.
diff --git a/deployment.yaml b/deployment.yaml
index 7351570b..5a650721 100644
--- a/deployment.yaml
+++ b/deployment.yaml
@@ -15,7 +15,7 @@ spec:
     spec:
       initContainers:
         - name: deps-install
-          image: ghcr.io/python-discord/snekbox:latest
+          image: ghcr.io/python-discord/snekbox:latest-pydis
           imagePullPolicy: Always
           volumeMounts:
             - name: snekbox-user-base-volume
@@ -25,7 +25,7 @@ spec:
             - scripts/install_eval_deps.sh
       containers:
         - name: snekbox
-          image: ghcr.io/python-discord/snekbox:latest
+          image: ghcr.io/python-discord/snekbox:latest-pydis
           imagePullPolicy: Always
           ports:
             - containerPort: 8060
diff --git a/requirements/coverage.pip b/requirements/coverage.pip
index 6fef2d18..b14c4372 100644
--- a/requirements/coverage.pip
+++ b/requirements/coverage.pip
@@ -4,7 +4,5 @@
 #
 #    pip-compile --output-file=requirements/coverage.pip requirements/coverage.in
 #
-coverage[toml]==7.6.9
-    # via
-    #   -r requirements/coverage.in
-    #   coverage
+coverage[toml]==7.11.0
+    # via -r requirements/coverage.in
diff --git a/requirements/lint.pip b/requirements/lint.pip
index c885feaf..8dbc08dd 100644
--- a/requirements/lint.pip
+++ b/requirements/lint.pip
@@ -6,19 +6,19 @@
 #
 cfgv==3.4.0
     # via pre-commit
-distlib==0.3.9
+distlib==0.4.0
     # via virtualenv
-filelock==3.16.1
+filelock==3.20.0
     # via virtualenv
-identify==2.6.3
+identify==2.6.15
     # via pre-commit
 nodeenv==1.9.1
     # via pre-commit
-platformdirs==4.3.6
+platformdirs==4.5.0
     # via virtualenv
-pre-commit==4.0.1
+pre-commit==4.3.0
     # via -r requirements/lint.in
-pyyaml==6.0.2
+pyyaml==6.0.3
     # via pre-commit
-virtualenv==20.28.0
+virtualenv==20.35.3
     # via pre-commit
diff --git a/requirements/pip-tools.pip b/requirements/pip-tools.pip
index 1948f7dc..9f9a3257 100644
--- a/requirements/pip-tools.pip
+++ b/requirements/pip-tools.pip
@@ -4,19 +4,15 @@
 #
 #    pip-compile --output-file=requirements/pip-tools.pip requirements/pip-tools.in
 #
-build==1.2.2.post1
+build==1.3.0
     # via pip-tools
-click==8.1.7
+click==8.3.0
     # via pip-tools
-colorama==0.4.6
+packaging==25.0
     # via
+    #   -c /Users/joe/Projects/python-discord/snekbox/requirements/requirements.pip
     #   build
-    #   click
-packaging==24.2
-    # via
-    #   -c C:\Users\chris\src\snekbox\requirements\requirements.pip
-    #   build
-pip-tools==7.4.1
+pip-tools==7.5.1
     # via -r requirements/pip-tools.in
 pyproject-hooks==1.2.0
     # via
diff --git a/requirements/requirements.pip b/requirements/requirements.pip
index 653c263d..229f8f0e 100644
--- a/requirements/requirements.pip
+++ b/requirements/requirements.pip
@@ -4,37 +4,35 @@
 #
 #    pip-compile --extra=gunicorn --extra=sentry --output-file=requirements/requirements.pip pyproject.toml
 #
-attrs==24.3.0
+attrs==25.4.0
     # via
     #   jsonschema
     #   referencing
-certifi==2024.12.14
+certifi==2025.10.5
     # via sentry-sdk
-falcon==4.0.2
+falcon==4.1.0
     # via
     #   sentry-sdk
     #   snekbox (pyproject.toml)
 gunicorn==23.0.0
     # via snekbox (pyproject.toml)
-jsonschema==4.23.0
+jsonschema==4.25.1
     # via snekbox (pyproject.toml)
-jsonschema-specifications==2024.10.1
+jsonschema-specifications==2025.9.1
     # via jsonschema
-packaging==24.2
+packaging==25.0
     # via gunicorn
-protobuf==5.29.2
+protobuf==6.33.0
     # via snekbox (pyproject.toml)
-referencing==0.35.1
+referencing==0.37.0
     # via
     #   jsonschema
     #   jsonschema-specifications
-rpds-py==0.22.3
+rpds-py==0.27.1
     # via
     #   jsonschema
     #   referencing
-sentry-sdk[falcon]==2.19.2
-    # via
-    #   sentry-sdk
-    #   snekbox (pyproject.toml)
-urllib3==2.2.3
+sentry-sdk[falcon]==2.42.0
+    # via snekbox (pyproject.toml)
+urllib3==2.5.0
     # via sentry-sdk
diff --git a/snekbox/__main__.py b/snekbox/__main__.py
index 1e5bceca..dbc2ab6a 100644
--- a/snekbox/__main__.py
+++ b/snekbox/__main__.py
@@ -13,18 +13,19 @@ def parse_args() -> argparse.Namespace:
     )
     parser.add_argument("code", help="the Python code to evaluate")
     parser.add_argument(
-        "nsjail_args",
-        action="store_const",
-        const=[],
+        "--nsjail-args",
+        nargs="*",
+        default=[],
+        dest="nsjail_args",
         help="override configured NsJail options (default: [])",
     )
     parser.add_argument(
-        "py_args",
-        action="store_const",
-        const=["-c"],
+        "--py-args",
+        nargs="*",
+        default=["-c"],
+        dest="py_args",
         help="arguments to pass to the Python process (default: ['-c'])",
     )
-
     # nsjail_args and py_args are just dummies for documentation purposes.
     # Their actual values come from all the unknown arguments.
     # There doesn't seem to be a better solution with argparse.
diff --git a/tests/test_nsjail.py b/tests/test_nsjail.py
index 035c94cf..9bc3cf1c 100644
--- a/tests/test_nsjail.py
+++ b/tests/test_nsjail.py
@@ -90,7 +90,7 @@ def test_subprocess_resource_unavailable(self):
             """
         ).strip()
 
-        result = self.eval_file(code)
+        result = self.eval_file(code, nsjail_args=("--cgroup_mem_max", "0"))
         self.assertEqual(result.returncode, 1)
         self.assertIn("Resource temporarily unavailable", result.stdout)
         # Expect n-1 processes to be opened by the presence of string like "2\n3\n4\n"
@@ -220,13 +220,6 @@ def test_forkbomb_resource_unavailable(self):
         # limit so that the only reason the test code should be killed is due to
         # PID exhaustion.
 
-        previous_pids_max, previous_mem_max = (
-            self.nsjail.config.cgroup_pids_max,
-            self.nsjail.config.cgroup_mem_max,
-        )
-        self.nsjail.config.cgroup_pids_max = 5
-        self.nsjail.config.cgroup_mem_max = 0
-
         code = dedent(
             """
             import os
@@ -235,14 +228,12 @@ def test_forkbomb_resource_unavailable(self):
             """
         ).strip()
 
-        try:
-            result = self.eval_file(code)
-            self.assertEqual(result.returncode, 1)
-            self.assertIn("Resource temporarily unavailable", result.stdout)
-            self.assertEqual(result.stderr, None)
-        finally:
-            self.nsjail.config.cgroup_pids_max = previous_pids_max
-            self.nsjail.config.cgroup_mem_max = previous_mem_max
+        result = self.eval_file(
+            code, nsjail_args=("--cgroup_mem_max", "0", "--cgroup_pids_max", "5")
+        )
+        self.assertEqual(result.returncode, 1)
+        self.assertIn("Resource temporarily unavailable", result.stdout)
+        self.assertEqual(result.stderr, None)
 
     def test_file_parsing_timeout(self):
         code = dedent(