diff -Naur libdeflate-sys-1.19.0-original/build.rs libdeflate-sys-1.19.0/build.rs
--- libdeflate-sys-1.19.0-original/build.rs	2006-07-23 21:21:28.000000000 -0400
+++ libdeflate-sys-1.19.0/build.rs	2024-01-05 13:37:12.729005469 -0500
@@ -5,6 +5,15 @@
 fn main() {
     let dst = PathBuf::from(env::var_os("OUT_DIR").unwrap());
 
+    if pkg_config::Config::new()
+        .print_system_libs(false)
+        .cargo_metadata(true)
+        .probe("libdeflate")
+        .is_ok()
+    {
+        return;
+    }
+
     let mut build = cc::Build::new();
 
     build
diff -Naur libdeflate-sys-1.19.0-original/Cargo.toml.orig libdeflate-sys-1.19.0/Cargo.toml.orig
--- libdeflate-sys-1.19.0-original/Cargo.toml.orig	2006-07-23 21:21:28.000000000 -0400
+++ libdeflate-sys-1.19.0/Cargo.toml.orig	2024-01-05 13:37:10.360975768 -0500
@@ -18,6 +18,7 @@
 
 [build-dependencies]
 cc = "1.0"
+pkg-config = "0.3.9"
 
 [features]
 freestanding = []