compress-drv: add zstd

pkgs/build-support/compress-drv/web.nix

@@ -3,6 +3,7 @@
   compressDrv,
   lib,
   zopfli,
+  zstd,
 }:
 /**
   compressDrvWeb compresses a derivation for common web server use.
@@ -126,6 +127,10 @@ drv:
   compressors ? {
     br = "${lib.getExe brotli} --keep --no-copy-stat {}";
     gz = "${lib.getExe zopfli} --keep {}";
+    # --force is required to not fail on symlinks
+    # for details on the compression level see
+    # https://github.com/NixOS/nixpkgs/pull/332752#issuecomment-2275110390
+    zstd = "${lib.getExe zstd} --force --keep --quiet -19 {}";
   },
 }:
 compressDrv drv {