unnethack: disable build parallelism

Without the change the build fails occasionally as:

gcc -DAUTOCONF -Wall -I../include -I./../include -g -O2 -c ./../sys/unix/unixmain.c
./../sys/unix/unixmain.c:9:10: fatal error: date.h: No such file or directory
9 | #include "date.h"
| ^~~~~~~~

+5 -1
+5 -1
pkgs/games/unnethack/default.nix
··· 33 33 }) 34 34 ]; 35 35 36 - enableParallelBuilding = true; 36 + # Fails the build occasionally due to missing buid depends: 37 + # ./../sys/unix/unixmain.c:9:10: fatal error: date.h: No such file or directory 38 + # TODO: remove once upstream issue is fixed: 39 + # https://github.com/UnNetHack/UnNetHack/issues/56 40 + enableParallelBuilding = false; 37 41 38 42 postInstall = '' 39 43 cp -r /tmp/unnethack $out/share/unnethack/profile