diff --git a/.github/workflows/CICD.yml b/.github/workflows/CICD.yml
index 9c0e94bb2..b2d77a5a4 100644
--- a/.github/workflows/CICD.yml
+++ b/.github/workflows/CICD.yml
@@ -7,6 +7,8 @@ name: CICD
 # spell-checker:ignore (shell/tools) choco clippy dmake dpkg esac fakeroot gmake grcov halium lcov libssl mkdir popd printf pushd rustc rustfmt rustup shopt xargs
 # spell-checker:ignore (misc) aarch alnum armhf bindir busytest coreutils gnueabihf issuecomment maint nullglob onexitbegin onexitend runtest tempfile testsuite uutils
 
+# ToDO: [2021-06; rivy] change from `cargo-tree` to `cargo tree` once MSRV is >= 1.45
+
 env:
   PROJECT_NAME: coreutils
   PROJECT_DESC: "Core universal (cross-platform) utilities"
diff --git a/.github/workflows/FixPR.yml b/.github/workflows/FixPR.yml
index cfcb6e597..d3f8a86b8 100644
--- a/.github/workflows/FixPR.yml
+++ b/.github/workflows/FixPR.yml
@@ -2,6 +2,8 @@ name: FixPR
 
 # Trigger automated fixes for PRs being merged (with associated commits)
 
+# ToDO: [2021-06; rivy] change from `cargo-tree` to `cargo tree` once MSRV is >= 1.45
+
 env:
   BRANCH_TARGET: master