diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
new file mode 100644
index 0000000..120d55e
--- /dev/null
+++ b/.devcontainer/Dockerfile
@@ -0,0 +1,17 @@
+FROM nixos/nix
+
+WORKDIR /autonomy
+COPY tools/nix ./tools/nix
+
+RUN echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf \
+  && echo "sandbox = relaxed" >> /etc/nix/nix.conf \
+  && echo "filter-syscalls = false" >> /etc/nix/nix.conf \
+  && echo "download-buffer-size = 268435456" >> /etc/nix/nix.conf \
+  && nix-channel --update \
+  && nix develop ./tools/nix --command echo "Nix environment built and cached" \
+  && mkdir -p /root/.local/bin \
+  && mkdir -p /root/.cache
+
+COPY . .
+
+CMD ["nix", "develop", "./tools/nix", "--command", "bash"]
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 8c0f46d..4581cf2 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,4 +1,9 @@
 {
-  "name": "Autonomy Builder",
-  "image": "ghcr.io/build-trust/autonomy-builder"
+  "name": "Builder",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": ".."
+  },
+  "workspaceFolder": "/autonomy",
+  "overrideCommand": false
 }
diff --git a/.github/actions/setup_nix/action.yaml b/.github/actions/setup_nix/action.yaml
index b83f5f4..3c3fa7e 100644
--- a/.github/actions/setup_nix/action.yaml
+++ b/.github/actions/setup_nix/action.yaml
@@ -45,6 +45,7 @@ runs:
 
         sudo mkdir -p /etc/nix
         echo "extra-experimental-features = flakes nix-command" > nix.conf
+        echo "download-buffer-size = 268435456" >> nix.conf
         sudo mv nix.conf /etc/nix/nix.conf
 
         # Restore nix directories from cache
diff --git a/tools/docker/dev/Dockerfile b/tools/docker/dev/Dockerfile
index 35efe8e..e615d10 100644
--- a/tools/docker/dev/Dockerfile
+++ b/tools/docker/dev/Dockerfile
@@ -6,6 +6,7 @@ COPY tools/nix ./tools/nix
 RUN echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf \
   && echo "sandbox = relaxed" >> /etc/nix/nix.conf \
   && echo "filter-syscalls = false" >> /etc/nix/nix.conf \
+  && echo "download-buffer-size = 268435456" >> /etc/nix/nix.conf \
   && nix-channel --update \
   && nix develop ./tools/nix --command echo "Nix environment built and cached" \
   && mkdir -p /root/.local/bin \