diff --git a/pkgs/development/tools/ocaml/obuild/default.nix b/pkgs/development/tools/ocaml/obuild/default.nix
index 0b5295654d3..1de95f73037 100644
--- a/pkgs/development/tools/ocaml/obuild/default.nix
+++ b/pkgs/development/tools/ocaml/obuild/default.nix
@@ -13,6 +13,7 @@ stdenv.mkDerivation {
   buildInputs = [ ocaml ];
 
   buildPhase = ''
+    patchShebangs ./bootstrap
     ./bootstrap
   '';