diff --git a/Gemfile b/Gemfile
index f75ce5d..7b60ce6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,3 @@
 source 'https://rubygems.org'
 
-gem "rake"
 gem "xmpp4r"
-gem "rubocop"
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..90e2a52
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,13 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    xmpp4r (0.5.6)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  xmpp4r
+
+BUNDLED WITH
+   1.17.2
diff --git a/Rakefile b/Rakefile
deleted file mode 100644
index 905b1c3..0000000
--- a/Rakefile
+++ /dev/null
@@ -1,12 +0,0 @@
-require "rubocop/rake_task"
-
-task default: %w[lint]
-
-task :run do
-  ruby "lib/dns-client.rb"
-end
-
-RuboCop::RakeTask.new(:lint) do |task|
-  task.patterns = ['lib/**/*.rb']
-  task.fail_on_error = false
-end
diff --git a/gemset.nix b/gemset.nix
new file mode 100644
index 0000000..fc227aa
--- /dev/null
+++ b/gemset.nix
@@ -0,0 +1,12 @@
+{
+  xmpp4r = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "15ls2yqjvflxrc8chv5pcdh2p1p9fjsky74yc8y7wvw90wz0izrb";
+      type = "gem";
+    };
+    version = "0.5.6";
+  };
+}
\ No newline at end of file