drone CI

.drone.yml

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+kind: pipeline
+name: nix builds
+
+steps:
+  - name: docker image
+    image: lnl7/nix:2020-03-07
+    commands:
+      - nix-build docker.nix

.envrc

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+eval "$(lorri direnv)"

shell.nix

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+let pkgs = import <nixpkgs> { };
+in pkgs.mkShell { buildInputs = with pkgs; [ go vgo2nix ]; }