Rename project to linux-utils, restructure & rewrite readme accordingly

journalctl-last-invocation/package.nix

@@ -0,0 +1,32 @@
+{
+	# Build tools.
+	installShellFiles, stdenvNoCC,
+
+	# Packages.
+	systemd, zsh,
+}:
+
+with stdenvNoCC;
+
+mkDerivation {
+	name = "journalctl-last-invocation";
+
+	src = ./.;
+
+	nativeBuildInputs = [ installShellFiles ];
+	buildInputs = [ zsh ];
+
+	installPhase = ''
+		runHook preInstall
+
+		installBin journalctl-last-invocation
+
+		runHook postInstall
+	'';
+
+	preFixup = ''
+		substituteInPlace $out/bin/journalctl-last-invocation \
+			--replace-fail journalctl ${systemd}/bin/journalctl \
+			--replace-fail systemctl ${systemd}/bin/systemctl
+	'';
+}