texlive.luajittex: disable binaries on unsupported platforms

pkgs/tools/typesetting/tex/texlive/default.nix

@@ -37,7 +37,7 @@ let
   overriddenTlpdb = let
     overrides = import ./tlpdb-overrides.nix {
       inherit
-        lib bin tlpdb tlpdbxz tl
+        stdenv lib bin tlpdb tlpdbxz tl
         installShellFiles
         coreutils findutils gawk getopt ghostscript_headless gnugrep
         gnumake gnupg gnused gzip ncurses perl python3 ruby zip;

pkgs/tools/typesetting/tex/texlive/tlpdb-overrides.nix

@@ -1,4 +1,4 @@
-{ lib, tlpdb, bin, tlpdbxz, tl
+{ stdenv, lib, tlpdb, bin, tlpdbxz, tl
 , installShellFiles
 , coreutils, findutils, gawk, getopt, ghostscript_headless, gnugrep
 , gnumake, gnupg, gnused, gzip, ncurses, perl, python3, ruby, zip
@@ -329,6 +329,11 @@ in lib.recursiveUpdate orig rec {
 
   #### misc
 
+  # RISC-V: https://github.com/LuaJIT/LuaJIT/issues/628
+  luajittex.binfiles = lib.optionals
+    (!(stdenv.hostPlatform.isPower && stdenv.hostPlatform.is64bit) && !stdenv.hostPlatform.isRiscV)
+    orig.luajittex.binfiles;
+
   # tlpdb lists license as "unknown", but the README says lppl13: http://mirrors.ctan.org/language/arabic/arabi-add/README
   arabi-add.license = [  "lppl13c" ];