diff --git a/devenv/src/command.rs b/devenv/src/command.rs
index 0e31f050b..2c43a9532 100644
--- a/devenv/src/command.rs
+++ b/devenv/src/command.rs
@@ -295,7 +295,7 @@ impl App {
                                 serde_json::from_slice::<CachixResponse>(&resp.bytes().unwrap())
                                     .expect("Failed to parse JSON");
                             new_known_keys
-                                .insert(name.clone(), resp_json.publicSigningKeys[0].clone());
+                                .insert(name.clone(), resp_json.public_signing_keys[0].clone());
                         }
                     }
                 }
@@ -384,7 +384,8 @@ pub struct CachixCaches {
 
 #[derive(Deserialize, Clone)]
 struct CachixResponse {
-    publicSigningKeys: Vec<String>,
+    #[serde(rename = "publicSigningKeys")]
+    public_signing_keys: Vec<String>,
 }
 
 #[derive(Deserialize, Clone)]
diff --git a/devenv/src/config.rs b/devenv/src/config.rs
index 61383b801..17ceae076 100644
--- a/devenv/src/config.rs
+++ b/devenv/src/config.rs
@@ -54,6 +54,7 @@ impl From<&Input> for FlakeInput {
 fn true_default() -> bool {
     true
 }
+#[allow(dead_code)]
 fn false_default() -> bool {
     false
 }