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mvillafuertem /
Created July 8, 2024 13:49 — forked from voidIess/
Adding the nix unstable channel

Using the nipkgs unstable channel


There a times when you need to build something from the nix unstable channel. For example the master contains a new package you need, but the next nixpkgs release is somewhere in the future, and you need this package now. In this guide I want to show how to install packages from unstable by using nix-env. Furthermore I hope to give a basic understanding of the channels concept.

What are nix channels?

A channel is a set of expressions which includes severall build, installation and configuration instructions for packages, services and the system itself. The repository normaly used here is nixpkgs. It is developed at

What is the nix unstable channel?

The unstable channel is a copy of the NixOS/nixpkgs master. It is pulled from github once in a while and will be available from a mirror under Since NixOS uses half-anual released stable channels, some changes (especially new f

mvillafuertem /
Created April 1, 2024 12:37 — forked from nat-418/
Manage Neovim plugins (and more!) with Nix and Home Manager

Manage Neovim plugins (and more!) with Nix and Home Manager

Highly extensible software like Emacs, Vim, and Neovim tend to grow their own package managers. A software developer, for example, might want to install editor plugins that hook into a particular programming language's linter or language server. The programmer's text editor is therefore extended to support managing additional software to extend the text editor. If this loop continues for too long, the programmer's editor becomes more delicate and complex. The remedy for this problem is to manage software using dedicated tools apart

mvillafuertem / parTraverseN.scala
Created February 15, 2024 15:29 — forked from gvolpe/parTraverseN.scala
parTraverse with a limit of N using a Semaphore
import cats.Traverse
import cats.effect._
import cats.effect.concurrent.Semaphore
import cats.temp.par._
import cats.syntax.all._
import scala.concurrent.duration._
object Main extends IOApp {
import ParTask._
mvillafuertem / README
Created November 3, 2023 17:08 — forked from jmatsushita/README
Setup nix, nix-darwin and home-manager from scratch on an M1 Macbook Pro
### [2023-06-19] UPDATE: Just tried to use my instructions again on a fresh install and it failed in a number of places.
###. Not sure if I'll update this gist (though I realise it seems to still have some traffic), but here's a list of
###. things to watch out for:
### - Check out the `nix-darwin` instructions, as they have changed.
### - There's a home manager gotcha
# I found some good resources but they seem to do a bit too much (maybe from a time when there were more bugs).
# So here's a minimal Gist which worked for me as an install on a new M1 Pro.
import cats.effect.std.{Dispatcher, Queue}
import cats.effect.{IO, IOApp}
import com.typesafe.scalalogging.Logger
import fs2.{Pipe, Stream}
import java.util.concurrent.atomic.AtomicInteger
import scala.collection.mutable
import scala.concurrent.duration.DurationInt
object Subscriptions {
// scalaVersion := "3.2.0"
// libraryDependencies ++= Seq(
// libraryDependencies ++= Seq(
// "org.typelevel" %% "cats-core" % "2.8.0",
// "dev.zio" %% "zio" % "2.0.0",
// "org.typelevel" %% "cats-effect" % "3.3.14",
// "org.typelevel" %% "kittens" % "3.0.0",
// "dev.zio" %% "zio-json" % "0.3.0-RC10",
// "io.d11" %% "zhttp" % "2.0.0-RC10"
// )
mvillafuertem /
Created February 17, 2023 19:08 — forked from sdkks/
How to SSH to Kubernetes Pod with SSH ProxyCommand using socat


  1. socat
  2. kubectl with proper ~/.kube/config that can connect to your cluster
  3. Working knowledge of kubectl client
  4. OpenSSH client

How does it work?

  1. kubectl does port forwarding to sshd port of your pod. I'm using pm2 process managed to keep my services alive in my workstation container. If you have only sshd, easiest to use is dropbear
  2. ProxyCommand of OpenSSH client uses socat to redirect two way fd - to forwarded port of kubectl
  3. Voila! You are in
mvillafuertem / pod.yaml
Created February 16, 2023 18:32 — forked from matthewpalmer/pod.yaml
Example Kubernetes pod for the multi-container sidecar design pattern
# Example YAML configuration for the sidecar pattern.
# It defines a main application container which writes
# the current date to a log file every five seconds.
# The sidecar container is nginx serving that log file.
# (In practice, your sidecar is likely to be a log collection
# container that uploads to external storage.)
# To run:
mvillafuertem /
Created October 5, 2022 08:59 — forked from IgorBerman/
akka streams in java with kill switch, shutdown hook and error handling
package com.example;
import java.util.concurrent.CompletionStage;
import scala.concurrent.Await;
import scala.concurrent.duration.Duration;
import akka.Done;
import akka.NotUsed;
import akka.japi.Pair;
mvillafuertem /
Created September 28, 2022 14:16 — forked from lobster1234/
Working with localstack on command line

Starting localstack

C02STG51GTFM:localstack mpandit$ make infra
. .venv/bin/activate; exec localstack/mock/
Starting local dev environment. CTRL-C to quit.
Starting local Elasticsearch (port 4571)...
Starting mock ES service (port 4578)...
Starting mock S3 server (port 4572)...
Starting mock SNS server (port 4575)...