netcdf: fix most tests

pkgs/development/libraries/netcdf/default.nix

@@ -16,6 +16,15 @@ in stdenv.mkDerivation rec {
     sha256 = "0hi61cdihwwvz5jz1l7yq712j7ca1cj4bhr8x0x7c2vlb1s9biw9";
   };
 
+  postPatch = ''
+    patchShebangs .
+
+    # this test requires the net
+    for a in ncdap_test/Makefile.am ncdap_test/Makefile.in; do
+      substituteInPlace $a --replace testurl.sh " "
+    done
+  '';
+
   nativeBuildInputs = [ m4 ];
   buildInputs = [ hdf5 curl mpi ];