--- a/rust/hg-core/Cargo.toml	Tue Jan 26 19:07:24 2021 +0100
+++ b/rust/hg-core/Cargo.toml	Tue Jan 26 20:05:37 2021 +0100
@@ -11,6 +11,7 @@
 [dependencies]
 bytes-cast = "0.1"
 byteorder = "1.3.4"
+derive_more = "0.99"
 im-rc = "15.0.*"
 lazy_static = "1.4.0"
 memchr = "2.3.3"