headroom doctest

src/Headroom/Command/Utils.hs:20:1: error:
        Could not load module ‘RIO’
        It is a member of the hidden package ‘rio-0.1.19.0’.

build-constraints.yaml

@@ -5946,6 +5946,9 @@ expected-test-failures:
 
     # https://github.com/clash-lang/clash-compiler/issues/1622
     - clash-prelude
+
+    # doctest: rio
+    - headroom
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run