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-rw-r--r--tvix/nix-compat/Cargo.toml5
1 files changed, 5 insertions, 0 deletions
diff --git a/tvix/nix-compat/Cargo.toml b/tvix/nix-compat/Cargo.toml
index 89aae3d4fad8..3820ed6b1fcd 100644
--- a/tvix/nix-compat/Cargo.toml
+++ b/tvix/nix-compat/Cargo.toml
@@ -5,15 +5,20 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[features]
+async = ["futures-util"]
+
 [dependencies]
 bstr = { version = "1.6.0", features = ["alloc", "unicode", "serde"] }
 data-encoding = "2.3.3"
+futures-util = { version = "0.3.28", features = ["io"], optional = true }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 sha2 = "0.10.6"
 thiserror = "1.0.38"
 
 [dev-dependencies]
+futures = { version = "0.3.28", default-features = false, features = ["executor"] }
 serde_json = "1.0"
 test-case = "2.2.2"