diff --git a/binaries/cli/src/build.rs b/binaries/cli/src/build.rs
index 3a1bb281..7783615b 100644
--- a/binaries/cli/src/build.rs
+++ b/binaries/cli/src/build.rs
@@ -23,15 +23,15 @@ pub fn build(dataflow: String, uv: bool) -> eyre::Result<()> {
         match node.kind()? {
             dora_core::descriptor::NodeKind::Standard(_) => {
                 if let Some(build) = &node.build {
-                    run_build_command(build, working_dir, uv, node.env.clone()).with_context(
-                        || format!("build command failed for standard node `{}`", node.id),
-                    )?
+                    run_build_command(build, working_dir, uv, &node.env).with_context(|| {
+                        format!("build command failed for standard node `{}`", node.id)
+                    })?
                 }
             }
             dora_core::descriptor::NodeKind::Runtime(runtime_node) => {
                 for operator in &runtime_node.operators {
                     if let Some(build) = &operator.config.build {
-                        run_build_command(build, working_dir, uv, node.env.clone()).with_context(
+                        run_build_command(build, working_dir, uv, &node.env).with_context(
                             || {
                                 format!(
                                     "build command failed for operator `{}/{}`",
@@ -44,22 +44,20 @@ pub fn build(dataflow: String, uv: bool) -> eyre::Result<()> {
             }
             dora_core::descriptor::NodeKind::Custom(custom_node) => {
                 if let Some(build) = &custom_node.build {
-                    run_build_command(build, working_dir, uv, node.env.clone()).with_context(
-                        || format!("build command failed for custom node `{}`", node.id),
-                    )?
+                    run_build_command(build, working_dir, uv, &node.env).with_context(|| {
+                        format!("build command failed for custom node `{}`", node.id)
+                    })?
                 }
             }
             dora_core::descriptor::NodeKind::Operator(operator) => {
                 if let Some(build) = &operator.config.build {
-                    run_build_command(build, working_dir, uv, node.env.clone()).with_context(
-                        || {
-                            format!(
-                                "build command failed for operator `{}/{}`",
-                                node.id,
-                                operator.id.as_ref().unwrap_or(&default_op_id)
-                            )
-                        },
-                    )?
+                    run_build_command(build, working_dir, uv, &node.env).with_context(|| {
+                        format!(
+                            "build command failed for operator `{}/{}`",
+                            node.id,
+                            operator.id.as_ref().unwrap_or(&default_op_id)
+                        )
+                    })?
                 }
             }
         }
diff --git a/binaries/daemon/src/spawn.rs b/binaries/daemon/src/spawn.rs
index 0c87449e..ec640952 100644
--- a/binaries/daemon/src/spawn.rs
+++ b/binaries/daemon/src/spawn.rs
@@ -608,7 +608,7 @@ impl Spawner<'_> {
             let uv = self.uv;
             let node_env = node_env.clone();
             let task = tokio::task::spawn_blocking(move || {
-                run_build_command(&build, &clone_dir, uv, node_env).context("build command failed")
+                run_build_command(&build, &clone_dir, uv, &node_env).context("build command failed")
             });
             task.await??;
         }
diff --git a/libraries/core/src/build.rs b/libraries/core/src/build.rs
index 4f8fba3d..2d900536 100644
--- a/libraries/core/src/build.rs
+++ b/libraries/core/src/build.rs
@@ -7,7 +7,7 @@ pub fn run_build_command(
     build: &str,
     working_dir: &Path,
     uv: bool,
-    envs: Option<BTreeMap<String, EnvValue>>,
+    envs: &Option<BTreeMap<String, EnvValue>>,
 ) -> eyre::Result<()> {
     let lines = build.lines().collect::<Vec<_>>();
     for build_line in lines {
@@ -26,7 +26,7 @@ pub fn run_build_command(
         cmd.args(split);
 
         // Inject Environment Variables
-        if let Some(envs) = envs.clone() {
+        if let Some(envs) = envs {
             for (key, value) in envs {
                 let value = value.to_string();
                 cmd.env(key, value);