diff --git a/packages/opencode/Dockerfile b/packages/opencode/Dockerfile
index f92b48a6d1b5..6b3e13b579f5 100644
--- a/packages/opencode/Dockerfile
+++ b/packages/opencode/Dockerfile
@@ -4,7 +4,8 @@ FROM alpine AS base
 # On ephemeral containers, the cache is not useful
 ARG BUN_RUNTIME_TRANSPILER_CACHE_PATH=0
 ENV BUN_RUNTIME_TRANSPILER_CACHE_PATH=${BUN_RUNTIME_TRANSPILER_CACHE_PATH}
-RUN apk add libgcc libstdc++ ripgrep
+RUN apk add libgcc libstdc++ libucontext ripgrep
+ENV LD_PRELOAD=/usr/lib/libucontext.so.1
 
 FROM base AS build-amd64
 COPY dist/opencode-linux-x64-baseline-musl/bin/opencode /usr/local/bin/opencode