diff --git a/Cargo.lock b/Cargo.lock
index 1c57205..4d213ab 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -459,6 +459,18 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "console"
+version = "0.15.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3d79fbe8970a77e3e34151cc13d3b3e248aa0faaecb9f6091fa07ebefe5ad60"
+dependencies = [
+ "encode_unicode",
+ "lazy_static",
+ "libc",
+ "windows-sys 0.42.0",
+]
+
 [[package]]
 name = "const-oid"
 version = "0.9.2"
@@ -888,6 +900,12 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "encode_unicode"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.32"
@@ -1436,6 +1454,19 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f2cb48b81b1dc9f39676bf99f5499babfec7cd8fe14307f7b3d747208fb5690"
 
+[[package]]
+name = "insta"
+version = "1.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fea5b3894afe466b4bcf0388630fc15e11938a6074af0cd637c825ba2ec8a099"
+dependencies = [
+ "console",
+ "lazy_static",
+ "linked-hash-map",
+ "similar",
+ "yaml-rust",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -1599,6 +1630,12 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "linked-hash-map"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.1.4"
@@ -1736,6 +1773,7 @@ dependencies = [
  "flate2",
  "heck",
  "indoc",
+ "insta",
  "is-terminal",
  "itertools",
  "once_cell",
@@ -2667,6 +2705,12 @@ dependencies = [
  "rand_core",
 ]
 
+[[package]]
+name = "similar"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "420acb44afdae038210c99e69aae24109f32f15500aa708e81d46c9f29d55fcf"
+
 [[package]]
 name = "sized-chunks"
 version = "0.6.5"
@@ -3587,6 +3631,15 @@ dependencies = [
  "dirs",
 ]
 
+[[package]]
+name = "yaml-rust"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
+dependencies = [
+ "linked-hash-map",
+]
+
 [[package]]
 name = "zeroize"
 version = "1.5.7"
diff --git a/Cargo.toml b/Cargo.toml
index 8bbb0cd..5f0d50b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -80,6 +80,11 @@ clap = { version = "4.1.9", features = ["derive"] }
 clap_complete = "4.1.5"
 clap_mangen = "0.2.10"
 
+[dev-dependencies]
+heck = "0.4.1"
+insta = "1.28.0"
+tempfile = "3.4.0"
+
 [features]
 default = ["vendored", "reqwest/rustls-tls"]
 vendored = ["cargo/vendored-libgit2", "cargo/vendored-openssl"]
diff --git a/scripts/lock-rust-fixture b/scripts/lock-rust-fixture
new file mode 100755
index 0000000..2178752
--- /dev/null
+++ b/scripts/lock-rust-fixture
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -eu
+
+dir=$(mktemp -d)
+cp "src/lang/rust/fixtures/$1.toml" "$dir/Cargo.toml"
+mkdir "$dir/src"
+touch "$dir/src/lib.rs"
+cargo generate-lockfile --manifest-path "$dir/Cargo.toml"
+cp "$dir/Cargo.lock" "src/lang/rust/fixtures/$1-lock.toml"
+rm -r "$dir"
diff --git a/src/inputs.rs b/src/inputs.rs
index baaf9aa..5355c15 100644
--- a/src/inputs.rs
+++ b/src/inputs.rs
@@ -5,7 +5,7 @@ use std::{
     fmt::Write,
 };
 
-#[derive(Default)]
+#[derive(Debug, Default)]
 pub struct AllInputs {
     pub native_build_inputs: Inputs,
     pub build_inputs: Inputs,
diff --git a/src/lang/rust/fixtures/libz-ng-lock.toml b/src/lang/rust/fixtures/libz-ng-lock.toml
new file mode 100644
index 0000000..c62001a
--- /dev/null
+++ b/src/lang/rust/fixtures/libz-ng-lock.toml
@@ -0,0 +1,56 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+
+[[package]]
+name = "cmake"
+version = "0.1.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db34956e100b30725f2eb215f90d4871051239535632f84fea3bc92722c66b7c"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
+[[package]]
+name = "libz-ng"
+version = "0.1.0"
+dependencies = [
+ "libz-sys",
+]
+
+[[package]]
+name = "libz-sys"
+version = "1.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9702761c3935f8cc2f101793272e202c72b99da8f4224a19ddcf1279a6450bbf"
+dependencies = [
+ "cc",
+ "cmake",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
+[[package]]
+name = "pkg-config"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"
+
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
diff --git a/src/lang/rust/fixtures/libz-ng.toml b/src/lang/rust/fixtures/libz-ng.toml
new file mode 100644
index 0000000..d556621
--- /dev/null
+++ b/src/lang/rust/fixtures/libz-ng.toml
@@ -0,0 +1,8 @@
+[package]
+name = "libz-ng"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+libz-sys = { version = "1.1.8", default-features = false, features = ["zlib-ng"] }
diff --git a/src/lang/rust/fixtures/libz-static-lock.toml b/src/lang/rust/fixtures/libz-static-lock.toml
new file mode 100644
index 0000000..743c2b5
--- /dev/null
+++ b/src/lang/rust/fixtures/libz-static-lock.toml
@@ -0,0 +1,46 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+
+[[package]]
+name = "libc"
+version = "0.2.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
+[[package]]
+name = "libz-static"
+version = "0.1.0"
+dependencies = [
+ "libz-sys",
+]
+
+[[package]]
+name = "libz-sys"
+version = "1.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9702761c3935f8cc2f101793272e202c72b99da8f4224a19ddcf1279a6450bbf"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
+[[package]]
+name = "pkg-config"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"
+
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
diff --git a/src/lang/rust/fixtures/libz-static.toml b/src/lang/rust/fixtures/libz-static.toml
new file mode 100644
index 0000000..1276bad
--- /dev/null
+++ b/src/lang/rust/fixtures/libz-static.toml
@@ -0,0 +1,8 @@
+[package]
+name = "libz-static"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+libz-sys = { version = "1.1.8", features = ["static"] }
diff --git a/src/lang/rust/fixtures/libz-stock-lock.toml b/src/lang/rust/fixtures/libz-stock-lock.toml
new file mode 100644
index 0000000..3b732e1
--- /dev/null
+++ b/src/lang/rust/fixtures/libz-stock-lock.toml
@@ -0,0 +1,56 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+
+[[package]]
+name = "cmake"
+version = "0.1.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db34956e100b30725f2eb215f90d4871051239535632f84fea3bc92722c66b7c"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
+[[package]]
+name = "libz-stock"
+version = "0.1.0"
+dependencies = [
+ "libz-sys",
+]
+
+[[package]]
+name = "libz-sys"
+version = "1.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9702761c3935f8cc2f101793272e202c72b99da8f4224a19ddcf1279a6450bbf"
+dependencies = [
+ "cc",
+ "cmake",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
+[[package]]
+name = "pkg-config"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"
+
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
diff --git a/src/lang/rust/fixtures/libz-stock.toml b/src/lang/rust/fixtures/libz-stock.toml
new file mode 100644
index 0000000..3394fc5
--- /dev/null
+++ b/src/lang/rust/fixtures/libz-stock.toml
@@ -0,0 +1,8 @@
+[package]
+name = "libz-stock"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+libz-sys = { version = "1.1.8", features = ["zlib-ng"] }
diff --git a/src/lang/rust/fixtures/zstd-env-lock.toml b/src/lang/rust/fixtures/zstd-env-lock.toml
new file mode 100644
index 0000000..4b2addd
--- /dev/null
+++ b/src/lang/rust/fixtures/zstd-env-lock.toml
@@ -0,0 +1,70 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+dependencies = [
+ "jobserver",
+]
+
+[[package]]
+name = "jobserver"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "936cfd212a0155903bcbc060e316fb6cc7cbf2e1907329391ebadc1fe0ce77c2"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
+[[package]]
+name = "pkg-config"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"
+
+[[package]]
+name = "zstd"
+version = "0.12.3+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76eea132fb024e0e13fd9c2f5d5d595d8a967aa72382ac2f9d39fcc95afd0806"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-env"
+version = "0.1.0"
+dependencies = [
+ "zstd",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "6.0.4+zstd.1.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7afb4b54b8910cf5447638cb54bf4e8a65cbedd783af98b98c62ffe91f185543"
+dependencies = [
+ "libc",
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.7+zstd.1.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94509c3ba2fe55294d752b79842c530ccfab760192521df74a081a78d2b3c7f5"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+]
diff --git a/src/lang/rust/fixtures/zstd-env.toml b/src/lang/rust/fixtures/zstd-env.toml
new file mode 100644
index 0000000..73fe099
--- /dev/null
+++ b/src/lang/rust/fixtures/zstd-env.toml
@@ -0,0 +1,8 @@
+[package]
+name = "zstd-env"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+zstd = "0.12.3"
diff --git a/src/lang/rust/fixtures/zstd-old-lock.toml b/src/lang/rust/fixtures/zstd-old-lock.toml
new file mode 100644
index 0000000..5646753
--- /dev/null
+++ b/src/lang/rust/fixtures/zstd-old-lock.toml
@@ -0,0 +1,64 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+dependencies = [
+ "jobserver",
+]
+
+[[package]]
+name = "jobserver"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "936cfd212a0155903bcbc060e316fb6cc7cbf2e1907329391ebadc1fe0ce77c2"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
+[[package]]
+name = "zstd"
+version = "0.12.3+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76eea132fb024e0e13fd9c2f5d5d595d8a967aa72382ac2f9d39fcc95afd0806"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-old"
+version = "0.1.0"
+dependencies = [
+ "zstd",
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "6.0.3+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68e4a3f57d13d0ab7e478665c60f35e2a613dcd527851c2c7287ce5c787e134a"
+dependencies = [
+ "libc",
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.4+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fa202f2ef00074143e219d15b62ffc317d17cc33909feac471c044087cad7b0"
+dependencies = [
+ "cc",
+ "libc",
+]
diff --git a/src/lang/rust/fixtures/zstd-old.toml b/src/lang/rust/fixtures/zstd-old.toml
new file mode 100644
index 0000000..1b3fa11
--- /dev/null
+++ b/src/lang/rust/fixtures/zstd-old.toml
@@ -0,0 +1,9 @@
+[package]
+name = "zstd-old"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+zstd = "0.12.3"
+zstd-sys = "=2.0.4"
diff --git a/src/lang/rust/fixtures/zstd-pkg-config-lock.toml b/src/lang/rust/fixtures/zstd-pkg-config-lock.toml
new file mode 100644
index 0000000..066e20a
--- /dev/null
+++ b/src/lang/rust/fixtures/zstd-pkg-config-lock.toml
@@ -0,0 +1,71 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+dependencies = [
+ "jobserver",
+]
+
+[[package]]
+name = "jobserver"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "936cfd212a0155903bcbc060e316fb6cc7cbf2e1907329391ebadc1fe0ce77c2"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
+[[package]]
+name = "pkg-config"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"
+
+[[package]]
+name = "zstd"
+version = "0.12.3+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76eea132fb024e0e13fd9c2f5d5d595d8a967aa72382ac2f9d39fcc95afd0806"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-old"
+version = "0.1.0"
+dependencies = [
+ "zstd",
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "6.0.3+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68e4a3f57d13d0ab7e478665c60f35e2a613dcd527851c2c7287ce5c787e134a"
+dependencies = [
+ "libc",
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.4+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fa202f2ef00074143e219d15b62ffc317d17cc33909feac471c044087cad7b0"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+]
diff --git a/src/lang/rust/fixtures/zstd-pkg-config.toml b/src/lang/rust/fixtures/zstd-pkg-config.toml
new file mode 100644
index 0000000..d07b11b
--- /dev/null
+++ b/src/lang/rust/fixtures/zstd-pkg-config.toml
@@ -0,0 +1,9 @@
+[package]
+name = "zstd-pkg-config"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+zstd = { version = "0.12.3", features = ["pkg-config"] }
+zstd-sys = "=2.0.4"
diff --git a/src/lang/rust/mod.rs b/src/lang/rust/mod.rs
index b7a71cf..e88b9cd 100644
--- a/src/lang/rust/mod.rs
+++ b/src/lang/rust/mod.rs
@@ -1,4 +1,6 @@
 mod deps;
+#[cfg(test)]
+mod tests;
 
 use anyhow::{anyhow, Context, Result};
 use cargo::{
diff --git a/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_ng.snap b/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_ng.snap
new file mode 100644
index 0000000..4e699fa
--- /dev/null
+++ b/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_ng.snap
@@ -0,0 +1,27 @@
+---
+source: src/lang/rust/tests.rs
+expression: run(stringify!(libz_ng))
+---
+AllInputs {
+    native_build_inputs: Inputs {
+        always: {
+            "pkg-config",
+        },
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    build_inputs: Inputs {
+        always: {},
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    env: {},
+}
diff --git a/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_static.snap b/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_static.snap
new file mode 100644
index 0000000..4f11233
--- /dev/null
+++ b/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_static.snap
@@ -0,0 +1,27 @@
+---
+source: src/lang/rust/tests.rs
+expression: run(stringify!(libz_static))
+---
+AllInputs {
+    native_build_inputs: Inputs {
+        always: {
+            "pkg-config",
+        },
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    build_inputs: Inputs {
+        always: {},
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    env: {},
+}
diff --git a/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_stock.snap b/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_stock.snap
new file mode 100644
index 0000000..b07be0d
--- /dev/null
+++ b/src/lang/rust/snapshots/nix_init__lang__rust__tests__libz_stock.snap
@@ -0,0 +1,29 @@
+---
+source: src/lang/rust/tests.rs
+expression: run(stringify!(libz_stock))
+---
+AllInputs {
+    native_build_inputs: Inputs {
+        always: {
+            "pkg-config",
+        },
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    build_inputs: Inputs {
+        always: {
+            "zlib",
+        },
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    env: {},
+}
diff --git a/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_env.snap b/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_env.snap
new file mode 100644
index 0000000..94cf120
--- /dev/null
+++ b/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_env.snap
@@ -0,0 +1,31 @@
+---
+source: src/lang/rust/tests.rs
+expression: run(stringify!(zstd_env))
+---
+AllInputs {
+    native_build_inputs: Inputs {
+        always: {
+            "pkg-config",
+        },
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    build_inputs: Inputs {
+        always: {
+            "zstd",
+        },
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    env: {
+        "ZSTD_SYS_USE_PKG_CONFIG": "true",
+    },
+}
diff --git a/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_old.snap b/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_old.snap
new file mode 100644
index 0000000..262ea43
--- /dev/null
+++ b/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_old.snap
@@ -0,0 +1,25 @@
+---
+source: src/lang/rust/tests.rs
+expression: run(stringify!(zstd_old))
+---
+AllInputs {
+    native_build_inputs: Inputs {
+        always: {},
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    build_inputs: Inputs {
+        always: {},
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    env: {},
+}
diff --git a/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_pkg_config.snap b/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_pkg_config.snap
new file mode 100644
index 0000000..7c8b434
--- /dev/null
+++ b/src/lang/rust/snapshots/nix_init__lang__rust__tests__zstd_pkg_config.snap
@@ -0,0 +1,29 @@
+---
+source: src/lang/rust/tests.rs
+expression: run(stringify!(zstd_pkg_config))
+---
+AllInputs {
+    native_build_inputs: Inputs {
+        always: {
+            "pkg-config",
+        },
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    build_inputs: Inputs {
+        always: {
+            "zstd",
+        },
+        darwin: {},
+        aarch64_darwin: {},
+        x86_64_darwin: {},
+        linux: {},
+        aarch64_linux: {},
+        x86_64_linux: {},
+    },
+    env: {},
+}
diff --git a/src/lang/rust/tests.rs b/src/lang/rust/tests.rs
new file mode 100644
index 0000000..4693031
--- /dev/null
+++ b/src/lang/rust/tests.rs
@@ -0,0 +1,45 @@
+use heck::AsKebabCase;
+use insta::assert_debug_snapshot;
+use tempfile::tempdir;
+
+use super::resolve_workspace;
+use crate::{inputs::AllInputs, lang::rust::load_rust_dependencies};
+
+use std::fs::{copy, create_dir, File};
+
+macro_rules! tests {
+    ($($name:ident)+) => {
+        $(
+            #[test]
+            fn $name() {
+                assert_debug_snapshot!(run(stringify!($name)));
+            }
+        )+
+    };
+}
+
+tests! {
+    libz_ng
+    libz_static
+    libz_stock
+    zstd_env
+    zstd_old
+    zstd_pkg_config
+}
+
+fn run(name: &str) -> AllInputs {
+    let dir = tempdir().unwrap();
+    let dir = dir.path();
+
+    let fixture = format!("src/lang/rust/fixtures/{}", AsKebabCase(name));
+    copy(format!("{fixture}.toml"), dir.join("Cargo.toml")).unwrap();
+    copy(format!("{fixture}-lock.toml"), dir.join("Cargo.lock")).unwrap();
+
+    let src = dir.join("src");
+    create_dir(&src).unwrap();
+    File::create(src.join("lib.rs")).unwrap();
+
+    let mut inputs = AllInputs::default();
+    load_rust_dependencies(&mut inputs, &resolve_workspace(dir).unwrap());
+    inputs
+}