diff --git a/immich/install.sh b/immich/install.sh
index 00612e2..a9e4b1a 100755
--- a/immich/install.sh
+++ b/immich/install.sh
@@ -14,22 +14,26 @@ WEB_PORT="${WEB_PORT:-2283}"
 DB_USERNAME="${DB_USERNAME:-postgres}"
 DB_DATABASE_NAME="${DB_DATABASE_NAME:-immich}"
 
-# Export all variables for envsubst
-export CONTAINER_NAME UPLOAD_LOCATION DB_DATA_LOCATION DB_PASSWORD DB_USERNAME DB_DATABASE_NAME
-export WEB_PORT IMMICH_VERSION ML_IMAGE_TAG
-
 cd "$SCRIPT_DIR" || _die "Failed to change to script directory"
 
-# Generate docker-compose.yml from template
+# Generate docker-compose.yml from template using sed
 echo "Generating docker-compose.yml..."
-envsubst < docker-compose.yml.template > docker-compose.yml \
+sed -e "s|\${CONTAINER_NAME}|${CONTAINER_NAME}|g" \
+    -e "s|\${UPLOAD_LOCATION}|${UPLOAD_LOCATION}|g" \
+    -e "s|\${DB_DATA_LOCATION}|${DB_DATA_LOCATION}|g" \
+    -e "s|\${DB_PASSWORD}|${DB_PASSWORD}|g" \
+    -e "s|\${DB_USERNAME}|${DB_USERNAME}|g" \
+    -e "s|\${DB_DATABASE_NAME}|${DB_DATABASE_NAME}|g" \
+    -e "s|\${WEB_PORT}|${WEB_PORT}|g" \
+    -e "s|\${IMMICH_VERSION}|${IMMICH_VERSION}|g" \
+    -e "s|\${ML_IMAGE_TAG}|${ML_IMAGE_TAG}|g" \
+    docker-compose.yml.template > docker-compose.yml \
     || _die "Failed to generate docker-compose.yml"
 
 # Add GPU configuration if enabled
 if [ "$ML_GPU_ENABLED" = "true" ]; then
     echo "Enabling GPU acceleration..."
-    GPU_CONFIG="    devices:\n      - /dev/dri:/dev/dri"
-    sed -i "s|#GPU_PLACEHOLDER#|${GPU_CONFIG}|" docker-compose.yml
+    sed -i 's|#GPU_PLACEHOLDER#|    devices:\n      - /dev/dri:/dev/dri|' docker-compose.yml
 else
     # Remove the placeholder
     sed -i '/#GPU_PLACEHOLDER#/d' docker-compose.yml