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Vladimír Čunát vcunat

  • cz.nic labs @CZ-NIC
  • Czech Republic
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vcunat / rebuild-amount.txt
Last active May 12, 2023 14:51
Packages dropped when marking OpenSSL 1.1 as vulnerable
$ git fetch just-for-vladimir
$ git checkout FETCH_HEAD
$ git rebase h/staging-next
$ env NIXPKGS_ALLOW_UNFREE=1 ./maintainers/scripts/ --print HEAD HEAD~1
Estimating rebuild amount by counting changed Hydra jobs (parallel=unset).
415 x86_64-darwin
560 x86_64-linux
_3llo.x86_64-darwin /nix/store/qzn9vnxh5xl9mbw8bwb9111z3fbqn0nm-3llo-1.3.1
vcunat / schema.json
Created March 29, 2023 09:41
"$schema": "",
"description": "Knot Resolver declarative configuration.",
"type": "object",
"properties": {
"version": {
"type": "integer",
"description": "Version of the configuration schema. By default it is the latest supported by the resolver, but couple of versions back are be supported as well.",
"default": 1
vcunat / schema.json
Created January 11, 2022 17:29
knot-resolver schema for YAML/JSON config [experimental]
{"$schema": "", "type": "object", "properties": {"server": {"type": "object", "properties": {"hostname": {"anyOf": [{"type": "string"}, {"type": "null"}], "default": null}, "groupid": {"anyOf": [{"type": "string"}, {"type": "null"}], "default": null}, "nsid": {"anyOf": [{"type": "string"}, {"type": "null"}], "default": null}, "workers": {"anyOf": [{"enum": ["auto"]}, {"type": "integer"}], "default": 1}, "use_cache_gc": {"type": "boolean", "default": true}, "backend": {"enum": ["auto", "systemd", "supervisord"], "default": "auto"}, "watchdog": {"anyOf": [{"enum": [false]}, {"type": "object", "properties": {"qname": {"type": "string"}, "qtype": {"enum": ["A", "A6", "AAAA", "AFSDB", "ANY", "APL", "ATMA", "AVC", "AXFR", "CAA", "CDNSKEY", "CDS", "CERT", "CNAME", "CSYNC", "DHCID", "DLV", "DNAME", "DNSKEY", "DOA", "DS", "EID", "EUI48", "EUI64", "GID", "GPOS", "HINFO", "HIP", "HTTPS", "IPSECKEY", "ISDN", "IXFR", "KEY", "KX", "L32", "L64", "LOC", "LP", "MAILA", "MAILB", "MB"
vcunat /
Last active July 24, 2018 13:46 — forked from grahamc/
don't force dig to use IPv4
#!/usr/bin/env nix-shell
#!nix-shell -i bash -p bind.dnsutils -p traceroute -p curl
# impure: needs ping
function _e {
echo "> $@"
eval "$@" 2>&1 | sed -e "s/^/ /"
printf "Exit: %s\n\n\n" "$?"
vcunat / release.nix
Last active December 20, 2017 14:35
{ nixpkgs ? <nixpkgs> }: {
inherit (import nixpkgs {}) hello;
vcunat /
Last active January 10, 2017 12:26
For proving github account ownership

Keybase proof

I hereby claim:

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To claim this, I am signing this object:

vcunat / default.nix
Created December 4, 2016 15:19
Linux->mingw cross-compiling shim: *-native is for packages not meant to be run on windows
lib = (import <nixpkgs> {}).lib;
pkgs-cross-xx = hostArch:
(name_: pkg: if lib.isDerivation pkg then pkg.crossDrv else pkg)
(pkgs-cross-xx-nocross hostArch);
pkgs-cross-xx-nocross = hostArch:
(import <nixpkgs> {
crossSystem = {
config = hostArch + "-w64-mingw32";
#!/usr/bin/env bash
if [ "$#" != 2 ]; then
echo "Usage: $0 commit-hash commit-hash"
echo -e "\tYou need to be in a git-controlled nixpkgs tree."
exit 1
echo "Estimating rebuild amount, by packages visible to nix-env:"
echo "(If you get 0, it's an evaluation error, most likely.)"
vcunat / zbar.nix
Created July 26, 2016 18:20
Zbar: nix expression for linux->mingw cross-compilation, both 32 and 64-bit.
{stdenv, fetchurl, pkgconfig, xmlto, imagemagick, libiconv}:
stdenv.mkDerivation rec {
name = "zbar-0-10";
src = fetchurl {
url =;
sha256 = "1imdvf5k34g1x2zr6975basczkz3zdxg6xnci50yyp5yvcwznki3";
vcunat / R.log
Last active January 2, 2016 09:15
Failure while linking R, using NIX_DEBUG=1 to show linker flags
original flags to /nix/store/vck6gcw6acfj5zbclaxq95dkx8askvc0-binutils-2.23.1-dev/bin/ld: