diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..4a4726a
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use_nix
diff --git a/.gitignore b/.gitignore
index 9eb978b..22a40f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@ project/plugins/project/
 .lib/
 .ensime
 .idea
+.direnv
 
 # ---> Scala
 *.class
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..fffdbc5
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,24 @@
+let
+  # Pin some fairly new nixpkgs
+  pkgs = import (builtins.fetchTarball {
+    name = "nixpkgs-unstable-2021-07-06";
+    url = "https://github.com/nixos/nixpkgs/archive/291b3ff5af268eb7a656bb11c73f2fe535ea2170.tar.gz";
+    sha256 = "1z2l7q4cmiaqb99cd8yfisdr1n6xbwcczr9020ss47y2z1cn1x7x";
+  }) {};
+in
+  pkgs.mkShell {
+    nativeBuildInputs = with pkgs; [
+      # JVM stuff
+      scala_2_13
+
+      # Build tools
+      gnumake
+      sbt
+
+      # Hardware
+      yosys
+      verilator
+      icestorm
+      nextpnr
+    ];
+  }