diff --git a/haskell/haddock.bzl b/haskell/haddock.bzl
index c0a61ae48e..f717cf031f 100644
--- a/haskell/haddock.bzl
+++ b/haskell/haddock.bzl
@@ -193,7 +193,7 @@ def _haskell_doc_rule_impl(ctx):
             command = """
       mkdir -p "{doc_dir}"
       # Copy Haddocks of a dependency.
-      cp -r -L "{html_dir}" "{target_dir}"
+      cp -R -L "{html_dir}" "{target_dir}"
       """.format(
                 doc_dir = doc_root_path,
                 html_dir = html_dir.path,
diff --git a/haskell/import.bzl b/haskell/import.bzl
index 1535c96283..7f39dee256 100644
--- a/haskell/import.bzl
+++ b/haskell/import.bzl
@@ -39,7 +39,7 @@ def copy_all(ctx, srcs, dest):
             inputs = depset(srcs),
             outputs = [dest],
             mnemonic = "Copy",
-            command = "mkdir -p {dest} && cp -L -r \"$@\" {dest}".format(dest = dest.path),
+            command = "mkdir -p {dest} && cp -L -R \"$@\" {dest}".format(dest = dest.path),
             arguments = [args],
         )