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-rw-r--r--compiler/rustc_data_structures/Cargo.toml6
1 files changed, 5 insertions, 1 deletions
diff --git a/compiler/rustc_data_structures/Cargo.toml b/compiler/rustc_data_structures/Cargo.toml
index 6876046a583..ff0a94f8e9b 100644
--- a/compiler/rustc_data_structures/Cargo.toml
+++ b/compiler/rustc_data_structures/Cargo.toml
@@ -12,7 +12,6 @@ elsa = "=1.7.1"
 ena = "0.14.3"
 indexmap = { version = "2.0.0" }
 jobserver_crate = { version = "0.1.28", package = "jobserver" }
-libc = "0.2"
 measureme = "11"
 rustc-hash = "1.1.0"
 rustc-rayon = { version = "0.5.0", optional = true }
@@ -41,6 +40,11 @@ features = [
     "Win32_System_Threading",
 ]
 
+[target.'cfg(unix)'.dependencies]
+# tidy-alphabetical-start
+libc = "0.2"
+# tidy-alphabetical-end
+
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 # tidy-alphabetical-start
 memmap2 = "0.2.1"