diff --git a/bundle.nix b/cmd/fpkg/build.nix
similarity index 98%
rename from bundle.nix
rename to cmd/fpkg/build.nix
index aa79890..dd9b30c 100644
--- a/bundle.nix
+++ b/cmd/fpkg/build.nix
@@ -8,6 +8,7 @@
 {
   lib,
   writeScript,
+  writeScriptBin,
   runtimeShell,
   writeText,
   symlinkJoin,
@@ -177,7 +178,7 @@ let
   };
 in
 
-writeScript "fortify-${pname}-bundle-prelude" ''
+writeScriptBin "build-fpkg-${pname}" ''
   #!${runtimeShell} -el
   OUT="$(mktemp -d)"
   TAR="$(mktemp -u)"
diff --git a/flake.nix b/flake.nix
index e306bcf..c87f004 100644
--- a/flake.nix
+++ b/flake.nix
@@ -32,7 +32,7 @@
       buildPackage = forAllSystems (
         system:
         nixpkgsFor.${system}.callPackage (
-          import ./bundle.nix {
+          import ./cmd/fpkg/build.nix {
             inherit
               nixpkgsFor
               system