diff --git a/README.md b/README.md
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+++ b/README.md
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+# does it build?
+
+A webapp that checks which Rust targets build at any nightly.
+
+It does this by executing `cargo build --release -Zbuild-std=core` for every target and every nightly and displaying the result.
+
+There's a background job that continously builds every target for every target that it hasn't built yet.
+It does this in parallel, using half of the available threads.
+
+
+## Configuration
+
+- `DB_PATH`: Path to SQlite DB to store the results
diff --git a/default.nix b/default.nix
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+++ b/default.nix
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+{ pkgs ? import <nixpkgs> { }, ... }: pkgs.rustPlatform.buildRustPackage {
+  src = pkgs.lib.cleanSource ./.;
+  pname = "does-it-build";
+  version = "0.1.0";
+  cargoLock.lockFile = ./Cargo.lock;
+}