https://sources.debian.org/data/main/r/rust-openssl-sys/0.9.53-1/debian/patches/disable-vendor.patch
"MIT" licensed according to debian/copyright file
slightly modified to only change the vendored openssl-src dependency

Starting from rust-openssl-sys@0.9.69 Cargo.toml starts searching for openssl-3.0.

--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,15 +31,12 @@
 [build-dependencies.cc]
 version = "1.0"
 
-[build-dependencies.openssl-src]
-version = "111"
-optional = true
-
 [build-dependencies.pkg-config]
 version = "0.3.9"
 
 [features]
 vendored = ["openssl-src"]
+openssl-src = []
 
 [target."cfg(target_env = \"msvc\")".build-dependencies.vcpkg]
 version = "0.2.8"