diff --git a/cachix/cachix/cosmic.nix b/cachix/cachix/cosmic.nix
new file mode 100644
index 0000000..8f89747
--- /dev/null
+++ b/cachix/cachix/cosmic.nix
@@ -0,0 +1,12 @@
+{
+  nix = {
+    settings = {
+      substituters = [
+        "https://cosmic.cachix.org"
+      ];
+      trusted-public-keys = [
+        "cosmic.cachix.org-1:Dya9IyXD4xdBehWjrkPv6rtxpmMdRel02smYzA85dPE="
+      ];
+    };
+  };
+}