Attempt nix-build instead of nixos-rebuild switch

I've encountered a few problems with attempting to support nixos-rebuild:
- the activation step requires `sudo` privileges
- the `buildkite-agent` runs on the same machine, socrates, that is rebuilding
  itself. This means that when the activation step runs, it will attempt to
  restart `buildkite-agent` when the agent is still working

I'm slowly removing places in my nix code that rely on '<bracket>' notation, so
that I no longer depend on NIX_PATH being set. I still have more work to do.

{covid-uk,sandbox}/default.nix are breaking when I attempt to run my
build-socrates.sh script locally, so I'm temporarily disabling them until I can
get CI working as I expect.

1 files changed, 13 insertions, 0 deletions

diff --git a/website/sandbox/default.nix.ignore b/website/sandbox/default.nix.ignore
new file mode 100644
index 000000000000..4f86b49002a5
--- /dev/null
+++ b/website/sandbox/default.nix.ignore
@@ -0,0 +1,13 @@
+{ pkgs, briefcase, ... }:
+
+pkgs.stdenv.mkDerivation {
+  name = "covid-uk";
+  buildInputs = [];
+  src = builtins.path { path = ./.; name = "sandbox"; };
+  buildPhase = ''
+    mkdir -p $out
+    cp $src/index.html $out
+    cp -r ${briefcase.website.sandbox.covid-uk} $out/covid-uk
+  '';
+  dontInstall = true;
+}