diff --git a/Cargo.lock b/Cargo.lock
index a9e01f0c06..12113a7334 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3235,7 +3235,6 @@ dependencies = [
  "anyhow",
  "clap 4.3.0",
  "nix 0.26.2",
- "serde_json",
  "spfs",
  "spfs-cli-common",
  "tokio",
diff --git a/crates/spfs-cli/cmd-enter/Cargo.toml b/crates/spfs-cli/cmd-enter/Cargo.toml
index 3b619a2359..e380850198 100644
--- a/crates/spfs-cli/cmd-enter/Cargo.toml
+++ b/crates/spfs-cli/cmd-enter/Cargo.toml
@@ -15,7 +15,6 @@ sentry = ["spfs-cli-common/sentry"]
 anyhow = { workspace = true }
 clap = { workspace = true }
 nix = { workspace = true }
-serde_json = { workspace = true }
 spfs = { path = "../../spfs" }
 spfs-cli-common = { path = "../common" }
 tokio = { version = "1.20", features = ["rt", "rt-multi-thread"] }
diff --git a/crates/spfs-cli/cmd-enter/src/cmd_enter.rs b/crates/spfs-cli/cmd-enter/src/cmd_enter.rs
index ef1b70f382..c0cd6804c8 100644
--- a/crates/spfs-cli/cmd-enter/src/cmd_enter.rs
+++ b/crates/spfs-cli/cmd-enter/src/cmd_enter.rs
@@ -14,7 +14,6 @@ use anyhow::{Context, Result};
 use clap::{Args, Parser};
 #[cfg(feature = "sentry")]
 use cli::configure_sentry;
-use serde_json::json;
 use spfs::monitor::SPFS_MONITOR_FOREGROUND_LOGGING_VAR;
 use spfs::storage::fs::RenderSummary;
 use spfs_cli_common as cli;
@@ -245,15 +244,9 @@ impl CmdEnter {
             .context("Failed to execute runtime command")
     }
 
-    fn report_render_summary(&self, render_summary: RenderSummary, render_time: f64) {
+    #[cfg_attr(not(feature = "sentry"), allow(unused))]
+    fn report_render_summary(&self, _render_summary: RenderSummary, render_time: f64) {
         if self.enter.metrics_in_env {
-            // The render summary data is put into a json blob in a
-            // environment variable for other, non-spfs, programs to
-            // access.
-            std::env::set_var(
-                "SPFS_METRICS_RENDER_REPORT",
-                format!("{}", json!(render_summary)),
-            );
             // The render time is put into environment variables for
             // other, non-spfs, programs to access. If this command
             // has been run from spfs-run, then the sync time will