diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 1a1a1c8..66647b5 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,13 +1,12 @@
 version: 2
 updates:
-
-- package-ecosystem: github-actions
-  directory: "/"
-  schedule:
-    interval: daily
-    time: '00:00'
-    timezone: UTC
-  open-pull-requests-limit: 10
-  commit-message:
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: daily
+      time: "00:00"
+      timezone: UTC
+    open-pull-requests-limit: 10
+    commit-message:
       prefix: "chore"
-      include: "scope"
\ No newline at end of file
+      include: "scope"
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c1b96e2..157fab3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,29 +12,29 @@ jobs:
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
-    - name: Install Nix
-      uses: ./
-      with:
-        nix_path: nixpkgs=channel:nixos-22.11
-    - 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
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: ./
+        with:
+          nix_path: nixpkgs=channel:nixos-22.11
+      - 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
   custom-nix-path:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
-    - name: Install Nix
-      uses: ./
-      with:
-        nix_path: nixpkgs=channel:nixos-20.03
-    - run: test $NIX_PATH == "nixpkgs=channel:nixos-20.03"
-    - run: nix-build test.nix
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: ./
+        with:
+          nix_path: nixpkgs=channel:nixos-20.03
+      - run: test $NIX_PATH == "nixpkgs=channel:nixos-20.03"
+      - run: nix-build test.nix
 
   extra-nix-config:
     strategy:
@@ -42,15 +42,15 @@ jobs:
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
-    - name: Install Nix
-      uses: ./
-      with:
-        nix_path: nixpkgs=channel:nixos-22.11
-        extra_nix_config: |
-          sandbox = relaxed
-    - run: cat /etc/nix/nix.conf
-    - run: nix-build test.nix --arg noChroot true
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: ./
+        with:
+          nix_path: nixpkgs=channel:nixos-22.11
+          extra_nix_config: |
+            sandbox = relaxed
+      - run: cat /etc/nix/nix.conf
+      - run: nix-build test.nix --arg noChroot true
 
   flakes:
     strategy:
@@ -58,10 +58,10 @@ jobs:
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
-    - name: Install Nix
-      uses: ./
-    - run: nix flake show github:NixOS/nixpkgs
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: ./
+      - run: nix flake show github:NixOS/nixpkgs
 
   installer-options:
     strategy:
@@ -69,36 +69,46 @@ jobs:
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
-    - name: Install Nix
-      uses: ./
-      with:
-        nix_path: nixpkgs=channel:nixos-22.11
-        install_options: --tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve
-        install_url: https://nixos-nix-install-tests.cachix.org/serve/s62m7lc0q0mz2mxxm9q0kkrcg90njzhq/install
-    - run: nix-build test.nix
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: ./
+        with:
+          nix_path: nixpkgs=channel:nixos-22.11
+          install_options: --tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve
+          install_url: https://nixos-nix-install-tests.cachix.org/serve/s62m7lc0q0mz2mxxm9q0kkrcg90njzhq/install
+      - run: nix-build test.nix
 
   oldest-supported-installer:
     strategy:
-        matrix:
-          os: [ubuntu-latest, macos-latest]
+      matrix:
+        os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
-    - name: Install Nix
-      uses: ./
-      with:
-        nix_path: nixpkgs=channel:nixos-22.11
-        install_url: https://releases.nixos.org/nix/nix-2.8.0/install
-    - run: nix-build test.nix
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: ./
+        with:
+          nix_path: nixpkgs=channel:nixos-22.11
+          install_url: https://releases.nixos.org/nix/nix-2.8.0/install
+      - run: nix-build test.nix
 
   act-support:
     strategy:
-        matrix:
-          os: [ubuntu-latest]
+      matrix:
+        os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
-    - run: curl https://raw.githubusercontent.com/nektos/act/master/install.sh | sudo bash
-    - run: docker pull ghcr.io/catthehacker/ubuntu:js-20.04
-    - run: ./bin/act -P ubuntu-latest=ghcr.io/catthehacker/ubuntu:js-20.04 push -j simple-build
+      - uses: actions/checkout@v3
+      - run: curl https://raw.githubusercontent.com/nektos/act/master/install.sh | sudo bash
+      - run: docker pull ghcr.io/catthehacker/ubuntu:js-20.04
+      - run: ./bin/act -P ubuntu-latest=ghcr.io/catthehacker/ubuntu:js-20.04 push -j simple-build
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: ./
+        with:
+          nix_path: nixpkgs=channel:nixos-22.11
+      - run: nix-shell --packages cacert git nix nodejs pre-commit --pure --run 'pre-commit run --all-files'
diff --git a/.gitignore b/.gitignore
index ffdd18c..c8b5532 100644
--- a/.gitignore
+++ b/.gitignore
@@ -91,3 +91,6 @@ typings/
 
 # DynamoDB Local files
 .dynamodb/
+
+# JetBrains IDEA configuration
+/.idea/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..2fc24e8
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,14 @@
+# Configuration file for pre-commit (https://pre-commit.com/).
+# Please run `pre-commit run --all-files` when adding or changing entries.
+
+repos:
+  - repo: https://github.com/kamadorueda/alejandra
+    rev: bb7f2ad3f176aa8e9e2944a10061f7989c8fef17 # frozen: 1.3.0
+    hooks:
+      - id: alejandra
+
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: 6f3cb139ef36133b6f903b97facc57b07cef57c9 # frozen: v3.0.0-alpha.6
+    hooks:
+      - id: prettier
+        stages: [commit]
diff --git a/README.md b/README.md
index c446da3..122fad1 100644
--- a/README.md
+++ b/README.md
@@ -33,11 +33,11 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v22
-      with:
-        nix_path: nixpkgs=channel:nixos-unstable
-    - run: nix-build
+      - uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v22
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - run: nix-build
 ```
 
 ## Usage with Flakes
@@ -51,12 +51,12 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v22
-      with:
-        github_access_token: ${{ secrets.GITHUB_TOKEN }}
-    - run: nix build
-    - run: nix flake check
+      - uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v22
+        with:
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+      - run: nix build
+      - run: nix flake check
 ```
 
 To install Nix from any commit, go to [the corresponding installer_test action](https://github.com/NixOS/nix/runs/2219534360) and click on "Run cachix/install-nix-action@XX" step and expand the first line.
diff --git a/action.yml b/action.yml
index 9bd8e05..9c667a9 100644
--- a/action.yml
+++ b/action.yml
@@ -1,24 +1,24 @@
-name: 'Install Nix'
-description: 'Installs Nix on GitHub Actions for the supported platforms: Linux and macOS.'
-author: 'Domen Kožar'
+name: "Install Nix"
+description: "Installs Nix on GitHub Actions for the supported platforms: Linux and macOS."
+author: "Domen Kožar"
 inputs:
   extra_nix_config:
-    description: 'Gets appended to `/etc/nix/nix.conf` if passed.'
+    description: "Gets appended to `/etc/nix/nix.conf` if passed."
   github_access_token:
-    description: 'Configure nix to pull from github using the given github token.'
+    description: "Configure nix to pull from github using the given github token."
   install_url:
-    description: 'Installation URL that will contain a script to install Nix.'
+    description: "Installation URL that will contain a script to install Nix."
   install_options:
-    description: 'Additional installer flags passed to the installer script.'
+    description: "Additional installer flags passed to the installer script."
   nix_path:
-    description: 'Set NIX_PATH environment variable.'
+    description: "Set NIX_PATH environment variable."
 branding:
-  color: 'blue'
-  icon: 'sun'
+  color: "blue"
+  icon: "sun"
 runs:
-  using: 'composite'
+  using: "composite"
   steps:
-    - run : ${GITHUB_ACTION_PATH}/install-nix.sh
+    - run: ${GITHUB_ACTION_PATH}/install-nix.sh
       shell: bash
       env:
         INPUT_EXTRA_NIX_CONFIG: ${{ inputs.extra_nix_config }}
diff --git a/test.nix b/test.nix
index 4f6ba38..998affd 100644
--- a/test.nix
+++ b/test.nix
@@ -1,18 +1,18 @@
 # Realizes <num>> of derivations with size of <size>MB
-{ size ? 1 # MB
-, num ? 10 # count 
-, currentTime ? builtins.currentTime
-, noChroot ? false
+{
+  size ? 1, # MB
+  num ? 10, # count
+  currentTime ? builtins.currentTime,
+  noChroot ? false,
 }:
-
-with import <nixpkgs> {};
-
-let
-  drv = i: runCommand "${toString currentTime}-${toString i}" {
-    __noChroot = noChroot;
-  } ''
-    dd if=/dev/zero of=$out bs=${toString size}MB count=1
-  '';
-in writeText "empty-${toString num}-${toString size}MB" ''
-  ${lib.concatMapStringsSep "" drv (lib.range 1 num)}
-''
+with import <nixpkgs> {}; let
+  drv = i:
+    runCommand "${toString currentTime}-${toString i}" {
+      __noChroot = noChroot;
+    } ''
+      dd if=/dev/zero of=$out bs=${toString size}MB count=1
+    '';
+in
+  writeText "empty-${toString num}-${toString size}MB" ''
+    ${lib.concatMapStringsSep "" drv (lib.range 1 num)}
+  ''