3 files changed, 1 insertions, 7 deletions
diff --git a/pkgs/development/tools/parsing/bison/builder-new.sh b/pkgs/development/tools/parsing/bison/builder-new.sh
index 42c191e3544e4..cff4b60c8e0c3 100755..100644
--- a/pkgs/development/tools/parsing/bison/builder-new.sh
+++ b/pkgs/development/tools/parsing/bison/builder-new.sh
@@ -1,5 +1,3 @@
-#! /bin/sh
-
 buildinputs="$m4"
 . $stdenv/setup || exit 1
 
diff --git a/pkgs/development/tools/parsing/bison/builder.sh b/pkgs/development/tools/parsing/bison/builder.sh
index c112a067c7b9a..04bd1e2d29322 100755..100644
--- a/pkgs/development/tools/parsing/bison/builder.sh
+++ b/pkgs/development/tools/parsing/bison/builder.sh
@@ -1,5 +1,3 @@
-#! /bin/sh
-
 buildinputs="$m4"
 . $stdenv/setup || exit 1
 
diff --git a/pkgs/development/tools/parsing/bison/default.nix b/pkgs/development/tools/parsing/bison/default.nix
index 085b1e0f63641..953915729e44b 100644
--- a/pkgs/development/tools/parsing/bison/default.nix
+++ b/pkgs/development/tools/parsing/bison/default.nix
@@ -1,13 +1,11 @@
 {stdenv, fetchurl, m4}:
 assert m4 != null;
-derivation {
+stdenv.mkDerivation {
   name = "bison-1.875";
-  system = stdenv.system;
   builder = ./builder.sh;
   src = fetchurl {
     url = ftp://ftp.nluug.nl/pub/gnu/bison/bison-1.875.tar.bz2;
     md5 = "b7f8027b249ebd4dd0cc948943a71af0";
   };
-  stdenv = stdenv;
   m4 = m4;
 }