diff --git a/linera-service/src/cli_wrappers/wallet.rs b/linera-service/src/cli_wrappers/wallet.rs
index 1c52ccdeaab5..137728d73ef7 100644
--- a/linera-service/src/cli_wrappers/wallet.rs
+++ b/linera-service/src/cli_wrappers/wallet.rs
@@ -614,6 +614,16 @@ impl ClientWrapper {
         let contract = release_dir.join(format!("{}_contract.wasm", name.replace('-', "_")));
         let service = release_dir.join(format!("{}_service.wasm", name.replace('-', "_")));
 
+        let contract_size = tokio::fs::metadata(&contract)
+            .await
+            .with_context(|| format!("Cannot find bytecode file {contract:?}"))?
+            .len();
+        let service_size = tokio::fs::metadata(&service)
+            .await
+            .with_context(|| format!("Cannot find bytecode file {service:?}"))?
+            .len();
+        info!("Done building application {name}: contract_size={contract_size}, service_size={service_size}");
+
         Ok((contract, service))
     }
 }
diff --git a/linera-service/src/linera.rs b/linera-service/src/linera.rs
index 8e21a42c8ffb..32309b8a661b 100644
--- a/linera-service/src/linera.rs
+++ b/linera-service/src/linera.rs
@@ -1312,7 +1312,8 @@ enum ProjectCommand {
         /// This is used to locate the generated bytecode. The generated bytecode should
         /// be of the form `<name>_{contract,service}.wasm`.
         ///
-        /// Defaults to the package name in Cargo.toml.
+        /// Defaults to the package name in Cargo.toml, with dashes replaced by
+        /// underscores.
         name: Option<String>,
 
         /// An optional chain ID to publish the bytecode. The default chain of the wallet
diff --git a/linera-service/src/project.rs b/linera-service/src/project.rs
index a76de13409cc..ead0e15d9b94 100644
--- a/linera-service/src/project.rs
+++ b/linera-service/src/project.rs
@@ -155,9 +155,14 @@ impl Project {
     ) -> Result<()> {
         let toml_path = project_root.join("Cargo.toml");
         let (linera_sdk_dep, linera_sdk_dev_dep) = Self::linera_sdk_dependencies(linera_root);
+        let binary_root_name = project_name.replace('-', "_");
+        let contract_binary_name = format!("{binary_root_name}_contract");
+        let service_binary_name = format!("{binary_root_name}_service");
         let toml_contents = format!(
             include_str!("../template/Cargo.toml.template"),
             project_name = project_name,
+            contract_binary_name = contract_binary_name,
+            service_binary_name = service_binary_name,
             linera_sdk_dep = linera_sdk_dep,
             linera_sdk_dev_dep = linera_sdk_dev_dep,
         );
@@ -253,7 +258,10 @@ impl Project {
     }
 
     pub fn build(&self, name: Option<String>) -> Result<(PathBuf, PathBuf), anyhow::Error> {
-        let name = name.unwrap_or(self.project_package_name()?);
+        let name = match name {
+            Some(name) => name,
+            None => self.project_package_name()?.replace('-', "_"),
+        };
         let contract_name = format!("{}_contract", name);
         let service_name = format!("{}_service", name);
         let cargo_build = Command::new("cargo")
diff --git a/linera-service/template/Cargo.toml.template b/linera-service/template/Cargo.toml.template
index 8b2f0ea7b253..b1d7559c3c39 100644
--- a/linera-service/template/Cargo.toml.template
+++ b/linera-service/template/Cargo.toml.template
@@ -18,11 +18,11 @@ thiserror = "1.0.38"
 webassembly-test = "0.1.0"
 
 [[bin]]
-name = "{project_name}_contract"
+name = "{contract_binary_name}"
 path = "src/contract.rs"
 
 [[bin]]
-name = "{project_name}_service"
+name = "{service_binary_name}"
 path = "src/service.rs"
 
 [profile.release]