diff --git a/default.nix b/default.nix
deleted file mode 100644
index 5963f18..0000000
--- a/default.nix
+++ /dev/null
@@ -1,3 +0,0 @@
-with import <nixpkgs> {};
-
-  (python3.withPackages (ps: [ps.numpy ps.matplotlib ps.mypy ps.tkinter ps.arpeggio])).env
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..e8d926d
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,3 @@
+with import <nixpkgs> {};
+
+  (python3.withPackages (ps: [ps.numpy (ps.matplotlib.override {enableQt=true;}) ps.mypy ps.arpeggio])).env