diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index a1cae0b..ba4f587 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@ _ReSharper.Caches/
 .DS_Store
 result
 .profile*
+.direnv/
 
 inputs/
 AdventOfCode2023.FSharp/Test/TestResults/