diff --git a/spec.json b/spec.json
new file mode 100644
index 0000000..235f2b3
--- /dev/null
+++ b/spec.json
@@ -0,0 +1,25 @@
+{
+	"enabled": 1,
+	"hidden": false,
+	"type": "legacy",
+	"description": "Build packages maintained by me",
+	"nixexprinput": "src",
+	"nixexprpath": "default.nix",
+	"checkinterval": 3600,
+	"schedulingshares": 100,
+	"enableemail": false,
+	"emailoverride": "",
+	"keepnr": 3,
+	"inputs": {
+		"src": {
+			"type": "git",
+			"value": "https://git.illustris.tech/illustris/hydra-builds master",
+			"emailresponsible": false
+		},
+		"nixpkgs": {
+			"type": "git",
+			"value": "https://github.com/NixOS/nixpkgs master",
+			"emailresponsible": false
+		}
+	}
+}