diff --git a/flake.nix b/flake.nix
index efb1a4e..63bd1c2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -125,6 +125,7 @@
         inherit (pkgs.python3Packages.linien-common) src version;
         sourceRoot = "source/linien-server";
         postPatch = ''
+          cp ${fast-servo-gateware}/csrmap.py linien_server/csrmap.py
           substituteInPlace linien_server/acquisition.py \
             --replace "  start_nginx()" "" \
             --replace "  stop_nginx()" "" \
@@ -175,6 +176,7 @@
           mkdir -p $out $out/nix-support
           cp gateware/build/top.bit $out
           cp linien-server/linien_server/gateware.bin $out
+          cp linien-server/linien_server/csrmap.py $out
           echo file binary-dist $out/top.bit >> $out/nix-support/hydra-build-products
           echo file binary-dist $out/gateware.bin >> $out/nix-support/hydra-build-products
         '';