diff --git a/services/analytics/Dockerfile.artifact b/services/analytics/Dockerfile.artifact
index 866cba7..384beba 100644
--- a/services/analytics/Dockerfile.artifact
+++ b/services/analytics/Dockerfile.artifact
@@ -20,7 +20,7 @@ COPY ${SOURCE_DIR}/ ./
 COPY services/analytics/nix/ nix/
 COPY scripts/nix-build-with-derived-hashes.sh /usr/local/bin/
 RUN rm -rf .git
-RUN nix-build-with-derived-hashes.sh \
+RUN /usr/local/bin/nix-build-with-derived-hashes.sh \
       nix-build "./${NIX_EXPRESSION}" "${NIX_ATTR}" "${SERVICE_VERSION}" \
       /result /nix-derived-hashes.json \
       mix-deps:mix_deps_hash \
diff --git a/services/pooler/Dockerfile.artifact b/services/pooler/Dockerfile.artifact
index 58c6bbd..c1b82ca 100644
--- a/services/pooler/Dockerfile.artifact
+++ b/services/pooler/Dockerfile.artifact
@@ -20,7 +20,7 @@ COPY ${SOURCE_DIR}/ ./
 COPY services/pooler/nix/ nix/
 COPY scripts/nix-build-with-derived-hashes.sh /usr/local/bin/
 RUN rm -rf .git
-RUN nix-build-with-derived-hashes.sh \
+RUN /usr/local/bin/nix-build-with-derived-hashes.sh \
       nix-build "./${NIX_EXPRESSION}" "${NIX_ATTR}" "${SERVICE_VERSION}" \
       /result /nix-derived-hashes.json \
       mix-deps:mix_deps_hash \
diff --git a/services/realtime/Dockerfile.artifact b/services/realtime/Dockerfile.artifact
index e17d371..3badabf 100644
--- a/services/realtime/Dockerfile.artifact
+++ b/services/realtime/Dockerfile.artifact
@@ -22,7 +22,7 @@ COPY scripts/nix-build-with-derived-hashes.sh /usr/local/bin/
 # The submodule's .git pointer references the host worktree; drop it so the
 # source is used as a plain path.
 RUN rm -rf .git
-RUN nix-build-with-derived-hashes.sh \
+RUN /usr/local/bin/nix-build-with-derived-hashes.sh \
       nix-build "./${NIX_EXPRESSION}" "${NIX_ATTR}" "${SERVICE_VERSION}" \
       /result /nix-derived-hashes.json \
       mix-deps:mix_deps_hash \
diff --git a/services/realtime/nix/default.nix b/services/realtime/nix/default.nix
index 6a5f860..de1d990 100644
--- a/services/realtime/nix/default.nix
+++ b/services/realtime/nix/default.nix
@@ -220,6 +220,11 @@ in
         [ -f "$vmargs" ] || continue
         printf '\n## Portable artifact: disksup would spawn a Nix store bash (see nix package)\n-os_mon start_disksup false\n' >> "$vmargs"
       done
+
+      for envsh in "$rootfs"/releases/*/env.sh; do
+        [ -f "$envsh" ] || continue
+        printf '\nexport RELEASE_DISTRIBUTION=none\n' >> "$envsh"
+      done
     '';
 
     postFixup = ''
diff --git a/services/realtime/runtime.env b/services/realtime/runtime.env
index fb4597a..00a277a 100644
--- a/services/realtime/runtime.env
+++ b/services/realtime/runtime.env
@@ -5,3 +5,4 @@
 ELIXIR_ERL_OPTIONS=+fnu +S 1:1 +SDio 1 +sbwt none +sbwtdcpu none +sbwtdio none
 # Metadata repo pool; holds server-side postgres backends (default 5).
 DB_POOL_SIZE=2
+CLUSTER_STRATEGIES=
diff --git a/services/realtime/smoke.sh b/services/realtime/smoke.sh
index 73780ba..ad6b311 100755
--- a/services/realtime/smoke.sh
+++ b/services/realtime/smoke.sh
@@ -125,6 +125,8 @@ container="realtime-smoke-$RUN_ID"
 run_container \
   "$container" \
   --network "$NETWORK" \
+  --cpus 1 \
+  --memory 384m \
   -p 127.0.0.1::4000 \
   -e DB_HOST="$POSTGRES_CONTAINER" \
   -e DB_PORT=5432 \