diff --git a/Dockerfile b/Dockerfile
index 6d9e4e0..7f0f2b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,6 +29,8 @@ RUN curl -s https://api.github.com/repos/aprsme/aprs/commits/main | grep -o '"sh
 
 # Install dependencies
 COPY mix.exs mix.lock ./
+# Extract the hash from mix.lock and write to a file
+RUN grep -oE 'aprs.*ref,\\s*"([a-f0-9]+)"' mix.lock | grep -oE '[a-f0-9]{7,}' | head -1 > /tmp/aprs_hash.txt
 RUN mix deps.get --only $MIX_ENV
 RUN mix deps.compile
 
@@ -70,6 +72,11 @@ COPY --from=builder /tmp/parser_hash.txt /app/parser_hash.txt
 # Set parser git hash environment variable for runtime
 RUN PARSER_HASH=$(cat /app/parser_hash.txt) && echo "PARSER_GIT_HASH=$PARSER_HASH" >> /etc/environment
 
+# In the runtime stage, after WORKDIR /app
+COPY --from=builder /tmp/aprs_hash.txt /app/aprs_hash.txt
+RUN echo "APRS_PARSER_HASH=$(cat /app/aprs_hash.txt)" >> /etc/environment
+ENV APRS_PARSER_HASH="unknown"
+
 # Copy release from builder
 COPY --from=builder --chown=nobody:root /app/release ./
 
diff --git a/lib/aprsme/dependency_info.ex b/lib/aprsme/dependency_info.ex
index 0b9cdb0..797402f 100644
--- a/lib/aprsme/dependency_info.ex
+++ b/lib/aprsme/dependency_info.ex
@@ -40,11 +40,7 @@ defmodule Aprsme.DependencyInfo do
   In production: uses the hash captured at compile time
   """
   def get_aprs_library_sha do
-    if Application.get_env(:aprsme, :env, :dev) == :prod do
-      @aprs_hash
-    else
-      get_aprs_sha_from_vendor()
-    end
+    System.get_env("APRS_PARSER_HASH") || "unknown"
   end
 
   defp get_aprs_sha_from_vendor do