uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/networking/slack-cli/default.nix

@@ -0,0 +1,50 @@
+# slack-cli must be configured using the SLACK_CLI_TOKEN environment variable.
+# Using `slack init` will not work because it tries to write to the Nix store.
+#
+# There is no reason that we couldn't change the file path that slack-cli uses
+# for token storage, except that it would make the Nix package inconsistent with
+# upstream and other distributions.
+
+{ stdenv, lib, fetchFromGitHub, curl, jq, coreutils, gnugrep, gnused
+, runtimeShell }:
+
+stdenv.mkDerivation rec {
+  pname = "slack-cli";
+  version = "0.18.0";
+
+  src = fetchFromGitHub {
+    owner = "rockymadden";
+    repo = "slack-cli";
+    rev = "v${version}";
+    sha256 = "022yr3cpfg0v7cxi62zzk08vp0l3w851qpfh6amyfgjiynnfyddl";
+  };
+
+  dontBuild = true;
+
+  installPhase = ''
+    mkdir -p "$out/bin"
+    cp src/slack "$out/bin/.slack-wrapped"
+
+    cat <<-WRAPPER > "$out/bin/slack"
+    #!${runtimeShell}
+    [ "\$1" = "init" -a -z "\$SLACK_CLI_TOKEN" ] && cat <<-'MESSAGE' >&2
+    WARNING: slack-cli must be configured using the SLACK_CLI_TOKEN
+    environment variable. Using \`slack init\` will not work because it tries
+    to write to the Nix store.
+
+    MESSAGE
+
+    export PATH=${lib.makeBinPath [ curl jq coreutils gnugrep gnused ]}:"\$PATH"
+    exec "$out/bin/.slack-wrapped" "\$@"
+    WRAPPER
+
+    chmod +x "$out/bin/slack"
+  '';
+
+  meta = {
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.qyliss ];
+    mainProgram = "slack";
+    platforms = lib.platforms.unix;
+  };
+}