initial backend nix build - get jar

flake.lock

@@ -18,6 +18,21 @@
         "type": "github"
       }
     },
+    "flake-utils_2": {
+      "locked": {
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1682080641,
@@ -36,7 +51,30 @@
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "sbt-derivation": "sbt-derivation"
+      }
+    },
+    "sbt-derivation": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1675083208,
+        "narHash": "sha256-+sSFhSpV2jckr1qYlX/SaxQ6IdpagD6o4rru/3HAl0I=",
+        "owner": "zaninime",
+        "repo": "sbt-derivation",
+        "rev": "92d6d6d825e3f6ae5642d1cce8ff571c3368aaf7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "zaninime",
+        "ref": "master",
+        "repo": "sbt-derivation",
+        "type": "github"
       }
     },
     "systems": {