diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2b71fd4..858bf10 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -3,10 +3,10 @@ on:
   pull_request:
   push:
 jobs:
-  tests:
+  simple-build:
     strategy:
       matrix:
-        os: [ubuntu-18.04, macos-latest]
+        os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2
@@ -14,8 +14,23 @@ jobs:
     - run: yarn build
     - name: Install Nix
       uses: ./
-    - run: nix-env -iA cachix -f https://github.com/NixOS/nixpkgs/tarball/ab5863afada3c1b50fc43bf774b75ea71b287cde
+    - run: nix-env -iA cachix -f https://cachix.org/api/v1/install
     - run: cat /etc/nix/nix.conf
     # cachix should be available and be able to configure a cache
     - run: cachix use cachix
     - run: nix-build test.nix
+  no-channel:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - run: yarn install --frozen-lockfile
+    - run: yarn build
+    - name: Install Nix
+      uses: ./
+      with:
+        skip_adding_nixpkgs_channel: true
+    - run: nix-build test.nix && exit 1 || echo "OK"
+    - run: NIX_PATH=nixpkgs=https://github.com/NixOS/nixpkgs/tarball/ab5863afada3c1b50fc43bf774b75ea71b287cde nix-build test.nix
\ No newline at end of file
diff --git a/action.yml b/action.yml
index d54e033..edeb03a 100644
--- a/action.yml
+++ b/action.yml
@@ -4,6 +4,8 @@ author: 'Domen Kožar'
 inputs:
   install_url:
     description: 'Installation URL that will contain a script to install Nix'
+  skip_adding_nixpkgs_channel:
+    description: 'Skip adding nixpkgs-unstable channel'
 branding:
   color: 'blue'
   icon: 'sun'
diff --git a/lib/install-nix.sh b/lib/install-nix.sh
index 7bd47c2..711199f 100755
--- a/lib/install-nix.sh
+++ b/lib/install-nix.sh
@@ -1,48 +1,34 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-export here=$(dirname "${BASH_SOURCE[0]}")
+# Set jobs to number of cores
+sudo sh -c 'echo max-jobs = auto >> /tmp/nix.conf'
+# Allow binary caches for runner user
+sudo sh -c 'echo trusted-users = root runner >> /tmp/nix.conf'
 
-nixConf() {
-  sudo mkdir -p /etc/nix
-  # Workaround a segfault: https://github.com/NixOS/nix/issues/2733
-  sudo sh -c 'echo http2 = false >> /etc/nix/nix.conf'
-  # Set jobs to number of cores
-  sudo sh -c 'echo max-jobs = auto >> /etc/nix/nix.conf'
-  # Allow binary caches for runner user
-  sudo sh -c 'echo trusted-users = root runner >> /etc/nix/nix.conf'
-}
-
-if [[ $OSTYPE =~ darwin ]]; then
-  # Catalina workaround https://github.com/NixOS/nix/issues/2925
-  $here/create-darwin-volume.sh
-
-  # Disable spotlight indexing of /nix to speed up performance
-  sudo mdutil -i off /nix
+if [[ $INPUT_SKIP_ADDING_NIXPKGS_CHANNEL = "true" ]]; then
+  extra_cmd=--no-channel-add
+else
+  extra_cmd=
 fi
 
-nixConf
+sh <(curl -L ${INPUT_INSTALL_URL:-https://nixos.org/nix/install}) \
+  --daemon --daemon-user-count 4 --nix-extra-conf-file /tmp/nix.conf --darwin-use-unencrypted-nix-store-volume $extra_cmd
 
-# Needed due to multi-user being too defensive
-export ALLOW_PREEXISTING_INSTALLATION=1
-
-sh <(curl -L ${INPUT_INSTALL_URL:-https://nixos.org/nix/install}) --daemon
-
-# write nix.conf again as installation overwrites it
-nixConf
-
-# macOS needs certificates hints
 if [[ $OSTYPE =~ darwin ]]; then
+  # Disable spotlight indexing of /nix to speed up performance
+  sudo mdutil -i off /nix
+
+  # macOS needs certificates hints
   cert_file=/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt
   echo "::set-env name=NIX_SSL_CERT_FILE::$cert_file"
   export NIX_SSL_CERT_FILE=$cert_file
   sudo launchctl setenv NIX_SSL_CERT_FILE "$cert_file"
 fi
 
-# Reload the daemon to pick up changes
-sudo pkill -HUP nix-daemon
-
 # Set paths
 echo "::add-path::/nix/var/nix/profiles/per-user/runner/profile/bin"
 echo "::add-path::/nix/var/nix/profiles/default/bin"
-echo "::set-env name=NIX_PATH::/nix/var/nix/profiles/per-user/root/channels"
\ No newline at end of file
+if [[ $INPUT_SKIP_ADDING_NIXPKGS_CHANNEL != "true" ]]; then
+echo "::set-env name=NIX_PATH::/nix/var/nix/profiles/per-user/root/channels"
+fi
\ No newline at end of file
diff --git a/lib/main.js b/lib/main.js
index abb019e..8bf216e 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -1,30 +1,4 @@
 "use strict";
-var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
-    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
-    return new (P || (P = Promise))(function (resolve, reject) {
-        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
-        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
-        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments || [])).next());
-    });
-};
 Object.defineProperty(exports, "__esModule", { value: true });
 const child_process_1 = require("child_process");
-const process_1 = require("process");
-const net_1 = require("net");
-function awaitSocket() {
-    return __awaiter(this, void 0, void 0, function* () {
-        const daemonSocket = net_1.createConnection({ path: '/nix/var/nix/daemon-socket/socket' });
-        daemonSocket.on('error', () => __awaiter(this, void 0, void 0, function* () {
-            console.log('Waiting for daemon socket to be available, reconnecting...');
-            yield new Promise(resolve => setTimeout(resolve, 500));
-            yield awaitSocket();
-        }));
-        daemonSocket.on('connect', () => {
-            process_1.exit(0);
-        });
-    });
-}
 child_process_1.execFileSync(`${__dirname}/install-nix.sh`, { stdio: 'inherit' });
-// nc doesn't work correctly on macOS :(
-awaitSocket();
diff --git a/src/main.ts b/src/main.ts
index 07313e3..492e4e6 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,20 +1,3 @@
 import { execFileSync } from 'child_process';
-import { exit } from 'process';
-import { createConnection } from 'net';
-
-async function awaitSocket() {
-  const daemonSocket = createConnection({ path: '/nix/var/nix/daemon-socket/socket' });
-  daemonSocket.on('error', async () => {
-    console.log('Waiting for daemon socket to be available, reconnecting...');
-    await new Promise(resolve => setTimeout(resolve, 500));
-    await awaitSocket();
-  });
-  daemonSocket.on('connect', () => {
-    exit(0);
-  });
-}
 
 execFileSync(`${__dirname}/install-nix.sh`, { stdio: 'inherit' });
-
-// nc doesn't work correctly on macOS :(
-awaitSocket();
\ No newline at end of file