Add getopt as a dependency

default.nix

@@ -1,18 +1,28 @@
-{ pkgs ? (import <nixpkgs> {}), stdenv ? pkgs.stdenv }:
+{ nixpkgs ? (import <nixpkgs> {}), stdenv ? nixpkgs.stdenv }:
 
-with pkgs;
+with nixpkgs;
 
 stdenv.mkDerivation rec {
   name = "tcrdd";
   version = "latest";
-  buildInputs = [ bash git ];
+  buildInputs = [ bash git getopt ];
 
   src = ./.;
-  phases = "installPhase fixupPhase";
-  installPhase = ''
-    mkdir tmp
+  patchPhase = ''
+    cp -r $src patched
+    chmod +w -R patched
+    patchShebangs patched/*.sh
+    substituteInPlace patched/tcrdd.sh --replace 'getopt' ${getopt}/bin/getopt
+    '';
+  buildPhase =''
+    cd patched
+    mkdir -p tmp 
     export SHUNIT_TMPDIR=./tmp
+    ./tcrdd_test.sh
+    cd -
+    '';
+  installPhase = ''
     mkdir -p $out/bin
-    cp $src/tcrdd.sh $out/bin/tcrdd
+    cp patched/tcrdd.sh $out/bin/tcrdd
   '';
 }