Giving this a whirl

Cargo.toml

@@ -7,6 +7,7 @@ members = [
   "tiledb/proc-macro",
   "tiledb/queries",
   "tiledb/sys",
+  "tiledb/sys-cfg",
   "tiledb/sys-defs",
   "tiledb/utils",
   "test-utils/cells",
@@ -56,6 +57,7 @@ tiledb-pod = { path = "tiledb/pod", version = "0.1.0" }
 tiledb-proc-macro = { path = "tiledb/proc-macro", version = "0.1.0" }
 tiledb-proptest-config = { path = "test-utils/proptest-config", version = "0.1.0" }
 tiledb-sys = { path = "tiledb/sys", version = "0.1.0" }
+tiledb-sys-cfg = { path = "tiledb/sys-cfg", version = "0.1.0" }
 tiledb-sys-defs = { path = "tiledb/sys-defs", version = "0.1.0" }
 tiledb-test-utils = { path = "tiledb/test-utils", version = "0.1.0" }
 tiledb-utils = { path = "tiledb/utils", version = "0.1.0" }

tiledb/api/Cargo.toml

@@ -31,6 +31,9 @@ tiledb-pod = { workspace = true, features = ["proptest-strategies", "option-subs
 tiledb-utils = { workspace = true }
 uri = { workspace = true }
 
+[build-dependencies]
+tiledb-sys-cfg = { workspace = true }
+
 [features]
 default = []
 arrow = ["dep:arrow", "dep:serde", "dep:serde_json", "tiledb-common/arrow", "tiledb-common/serde"]

tiledb/api/build.rs

@@ -1,3 +1,3 @@
 fn main() {
-    println!("cargo:rustc-env=DYLD_FALLBACK_LIBRARY_PATH=/opt/tiledb/lib");
+    tiledb_sys_cfg::rpath();
 }

tiledb/queries/Cargo.toml

@@ -7,3 +7,6 @@ version.workspace = true
 [dependencies]
 tiledb-api = { workspace = true }
 tiledb-common = { workspace = true }
+
+[build-dependencies]
+tiledb-sys-cfg = { workspace = true }

tiledb/queries/build.rs

@@ -1,3 +1,3 @@
 fn main() {
-    println!("cargo:rustc-env=DYLD_FALLBACK_LIBRARY_PATH=/opt/tiledb/lib");
+    tiledb_sys_cfg::rpath();
 }

tiledb/sys-cfg/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "tiledb-sys-cfg"
+edition.workspace = true
+rust-version.workspace = true
+version.workspace = true
+
+[dependencies]
+tiledb-sys = { workspace = true }

tiledb/sys-cfg/src/lib.rs

@@ -0,0 +1,17 @@
+/// Configure rpath for crates that depend on tiledb-sys
+///
+/// Any crate that depends on tiledb-sys should call this function in its
+/// build.rs so that it rustc is correctly configured. Note that for anyone
+/// building static binaries, this is a no-op when tiledb-sys was built
+/// statically.
+pub fn rpath() {
+    let libdir = option_env!("DEP_TILEDB_LIBDIR");
+    if libdir.is_none() {
+        return;
+    }
+
+    println!(
+        "cargo:rustc-link-arg=-Wl,-rpath,@loader_path,-rpath,$ORIGIN,-rpath,{}",
+        libdir.unwrap()
+    );
+}

tiledb/sys/src/lib.rs

@@ -67,18 +67,3 @@ pub use subarray::*;
 pub use types::*;
 pub use version::*;
 pub use vfs::*;
-
-/// Configure rpath for crates that depend on tiledb-sys
-///
-/// Any crate that depends on tiledb-sys should call this function in its
-/// build.rs so that it rustc is correctly configured. Note that for anyone
-/// building static binaries, this is a no-op when tiledb-sys was built
-/// statically.
-pub fn rpath() {
-    if let Ok(libdir) = std::env::var("DEP_TILEDB_LIBDIR") {
-        println!(
-            "cargo:rustc-link-arg=-Wl,-rpath,@loader_path,-rpath,$ORIGIN,-rpath,{}",
-            libdir
-        );
-    }
-}