diff --git a/flake.nix b/flake.nix
index d10f4f4aa..540d5af78 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,7 +17,7 @@
       {
         packages.scripts = defaultPkgs.callPackage ./scripts/govtool { pkgs = defaultPkgs; };
         packages.infra = defaultPkgs.callPackage ./infra/terraform { pkgs = defaultPkgs; };
-        packages.backend = defaultPkgs.callPackage ./govtool/backend { pkgs = defaultPkgs; };
+        packages.backend = defaultPkgs.callPackage ./govtool/backend { pkgs = defaultPkgs; incl = nix-inclusive.lib.inclusive; };
         packages.frontend = frontend;
         packages.webserver = defaultPkgs.callPackage frontend.webserver {
           staticSiteRoot = frontend.staticSite.overrideAttrs (finalAttrs: prevAttrs: {
diff --git a/govtool/backend/default.nix b/govtool/backend/default.nix
index 575bf4dcc..03df035c3 100644
--- a/govtool/backend/default.nix
+++ b/govtool/backend/default.nix
@@ -1,4 +1,4 @@
-{ pkgs ? import <nixpkgs> { } }:
+{ pkgs ? import <nixpkgs> { }, incl }:
 let
   inherit (pkgs.lib.trivial) pipe;
   inherit (pkgs) haskell;
@@ -22,7 +22,13 @@ let
   modifier = drv: pipe drv [ appendLibraries appendTools ];
 
   project = ghcPackages.developPackage {
-    root = ./.;
+    root = incl ./. [
+      ./vva-be.cabal
+      ./app
+      ./src
+      ./CHANGELOG.md
+      ./sql
+    ];
     modifier = modifier;
     overrides = self: super: { openapi3 = useBroken super.openapi3; };
   };