diff --git a/cachix/numtide.nix b/cachix/numtide.nix
new file mode 100644
index 0000000..309a03b
--- /dev/null
+++ b/cachix/numtide.nix
@@ -0,0 +1,13 @@
+
+{
+  nix = {
+    settings = {
+      substituters = [
+        "https://numtide.cachix.org"
+      ];
+      trusted-public-keys = [
+        "numtide.cachix.org-1:2ps1kLBUWjxIneOy1Ik6cQjb41X0iXVXeHigGmycPPE="
+      ];
+    };
+  };
+}