flickzeug 0.5.1

diff --git a/Cargo.toml b/Cargo.toml
index 9f6b906..74f16a4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -64,6 +64,9 @@ termcolor = "^1.1"
 toml = { version = "^0.5", optional = true }
 zip = { version = "^0.5", default-features = false, features = ["deflate"] }
 
+[patch.crates-io]
+libz-sys = { git = 'https://github.com/pkgw/libz-sys', branch = 'pkgconfig.msvc' }
+
 [features]
 default = ["serialization"]
 # Note: we used to have this to couple "serde" and "serde-derive", but we've