diff --git a/pkgs/development/ocaml-modules/javalib/configure.sh.patch b/pkgs/development/ocaml-modules/javalib/configure.sh.patch
index 77a2a5ba4ae5..67e019b277af 100644
--- a/pkgs/development/ocaml-modules/javalib/configure.sh.patch
+++ b/pkgs/development/ocaml-modules/javalib/configure.sh.patch
@@ -1,11 +1,5 @@
 --- javalib-2.3-orig/configure.sh	2013-10-30 08:35:30.000000000 +0100
 +++ javalib-2.3/configure.sh	2014-07-06 17:28:39.025066199 +0200
-@@ -1,4 +1,4 @@
--#!/bin/bash
-+#!/bin/sh
-
- ###
- ### A configuration script for Javalib
 @@ -44,7 +44,7 @@
  DESTDIR=
  # The ocamlpath variable for the compiler to locate the locally-installed
diff --git a/pkgs/development/ocaml-modules/javalib/default.nix b/pkgs/development/ocaml-modules/javalib/default.nix
index 2fa72dcf07f1..365fcc677cc9 100644
--- a/pkgs/development/ocaml-modules/javalib/default.nix
+++ b/pkgs/development/ocaml-modules/javalib/default.nix
@@ -20,6 +20,8 @@ stdenv.mkDerivation rec {
 
   createFindlibDestdir = true;
 
+  preConfigure = "patchShebangs ./configure.sh";
+
   configureScript = "./configure.sh";
   dontAddPrefix = "true";
 
diff --git a/pkgs/development/ocaml-modules/sawja/configure.sh.patch b/pkgs/development/ocaml-modules/sawja/configure.sh.patch
index e01df32bbded..8165de242f57 100644
--- a/pkgs/development/ocaml-modules/sawja/configure.sh.patch
+++ b/pkgs/development/ocaml-modules/sawja/configure.sh.patch
@@ -1,11 +1,5 @@
 --- sawja-1.5-orig/configure.sh	2013-10-30 08:35:29.000000000 +0100
 +++ sawja-1.5/configure.sh	2014-07-05 18:50:26.833798254 +0200
-@@ -1,4 +1,4 @@
--#!/bin/bash
-+#!/bin/sh
-
- ###
- ### A configuration script for Sawja
 @@ -39,7 +39,7 @@
  DESTDIR=
  # The ocamlpath variable for the compiler to locate the locally-installed
diff --git a/pkgs/development/ocaml-modules/sawja/default.nix b/pkgs/development/ocaml-modules/sawja/default.nix
index bed87a50f81d..ef3ab9a46b93 100644
--- a/pkgs/development/ocaml-modules/sawja/default.nix
+++ b/pkgs/development/ocaml-modules/sawja/default.nix
@@ -19,6 +19,8 @@ stdenv.mkDerivation rec {
 
   createFindlibDestdir = true;
 
+  preConfigure = "patchShebangs ./configure.sh";
+
   configureScript = "./configure.sh";
   dontAddPrefix = "true";