diff --git a/Cargo.toml b/Cargo.toml
index b96440ba52..a791ddaca1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -52,6 +52,13 @@ features = ["serde"]
 embed-resource = "1.3"
 
 
+# https://travis-ci.org/nabijaczleweli/cargo-update/jobs/619241497#L222 broke 1.35.0 with smallvec 1.0.0,
+# required by unicode-normalization 0.1.11. Previous working build is
+# https://travis-ci.org/nabijaczleweli/cargo-update/jobs/611381166#L271 with unicode-normalization 0.1.9
+[patch.crates-io]
+unicode-normalization = { version = "0.1.9" }
+
+
 [[bin]]
 name = "cargo-install-update"
 path = "src/main.rs"
diff --git a/man/cargo-install-update.md b/man/cargo-install-update.md
index ab921b7c03..95400f981e 100644
--- a/man/cargo-install-update.md
+++ b/man/cargo-install-update.md
@@ -16,6 +16,11 @@ Updates packages from the main repository and git repositories.
 
 See cargo-install-update-config(1) for further configuring updates.
 
+The `CARGO_INSTALL_OPTS` environment variable can be set,
+containing options to forward to the end of `cargo install` invocations'
+argument lists.
+Note, that cargo-install-update-config(1) is preferred in the general case.
+
 Exit values and possible errors:
 
     -1 - cargo subprocess was terminated by a signal (Linux-only)