uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/text/ispell/default.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchurl, bison, ncurses }:
+
+stdenv.mkDerivation rec {
+  pname = "ispell";
+  version = "3.4.04";
+
+  src = fetchurl {
+    url = "https://www.cs.hmc.edu/~geoff/tars/${pname}-${version}.tar.gz";
+    sha256 = "sha256-h7zW8FIdhaCjp4NCFZVtdOvEkxRMx8eR+HvmhyzP4T4=";
+  };
+
+  buildInputs = [ bison ncurses ];
+
+  postPatch = ''
+    cat >> local.h <<EOF
+    ${lib.optionalString (!stdenv.isDarwin) "#define USG"}
+    #define TERMLIB "-lncurses"
+    #define LANGUAGES "{american,MASTERDICTS=american.med,HASHFILES=americanmed.hash}"
+    #define MASTERHASH "americanmed.hash"
+    #define BINDIR "$out/bin"
+    #define LIBDIR "$out/lib"
+    #define ELISPDIR "{$out}/share/emacs/site-lisp"
+    #define TEXINFODIR "$out/share/info"
+    #define MAN1DIR "$out/share/man/man1"
+    #define MAN4DIR "$out/share/man/man4"
+    #define MAN45DIR "$out/share/man/man5"
+    #define MINIMENU
+    #define HAS_RENAME
+    EOF
+  '';
+
+  meta = with lib; {
+    description = "An interactive spell-checking program for Unix";
+    homepage = "https://www.cs.hmc.edu/~geoff/ispell.html";
+    license = licenses.free;
+    platforms = platforms.unix;
+  };
+}