nixpkgs/pkgs/games/deliantra/0002-datadir.patch

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--- a/utils/cfutil.in
+++ b/utils/cfutil.in
@@ -27,7 +27,7 @@ use common::sense;
my $prefix = "@prefix@";
my $exec_prefix = "@exec_prefix@";
my $datarootdir = "@datarootdir@";
-my $DATADIR = "@datadir@/@PACKAGE@";
+my $DATADIR = $ENV{'DELIANTRA_DATADIR'} || "@datadir@/@PACKAGE@";
my $CONVERT = "@CONVERT@";
my $IDENTIFY = "@IDENTIFY@";