diff --git a/crates/puffin-client/src/registry_client.rs b/crates/puffin-client/src/registry_client.rs
index 5410004f2..d2d3acba9 100644
--- a/crates/puffin-client/src/registry_client.rs
+++ b/crates/puffin-client/src/registry_client.rs
@@ -245,7 +245,8 @@ impl RegistryClient {
                         .await?
                 }
                 FileLocation::Path(path) => {
-                    let reader = fs_err::tokio::File::open(&path).await?;
+                    let file = fs_err::tokio::File::open(&path).await?;
+                    let reader = tokio::io::BufReader::new(file);
                     read_metadata_async(&wheel.filename, built_dist.to_string(), reader).await?
                 }
             },
@@ -258,7 +259,8 @@ impl RegistryClient {
                 .await?
             }
             BuiltDist::Path(wheel) => {
-                let reader = fs_err::tokio::File::open(&wheel.path).await?;
+                let file = fs_err::tokio::File::open(&wheel.path).await?;
+                let reader = tokio::io::BufReader::new(file);
                 read_metadata_async(&wheel.filename, built_dist.to_string(), reader).await?
             }
         };
diff --git a/crates/puffin-distribution/src/download.rs b/crates/puffin-distribution/src/download.rs
index 1ac8f67a5..5ca29962e 100644
--- a/crates/puffin-distribution/src/download.rs
+++ b/crates/puffin-distribution/src/download.rs
@@ -1,14 +1,7 @@
 use std::path::{Path, PathBuf};
 
-use anyhow::Result;
-use zip::ZipArchive;
-
 use distribution_filename::WheelFilename;
 use distribution_types::{CachedDist, Dist};
-use install_wheel_rs::read_dist_info;
-use pypi_types::Metadata21;
-
-use crate::error::Error;
 
 /// A wheel that's been unzipped while downloading
 #[derive(Debug, Clone)]
@@ -126,14 +119,3 @@ impl std::fmt::Display for LocalWheel {
         write!(f, "{}", self.remote())
     }
 }
-
-impl BuiltWheel {
-    /// Read the [`Metadata21`] from a wheel.
-    pub fn read_dist_info(&self) -> Result<Metadata21, Error> {
-        let mut archive = ZipArchive::new(fs_err::File::open(&self.path)?)?;
-        let dist_info = read_dist_info(&self.filename, &mut archive).map_err(|err| {
-            Error::DistInfo(Box::new(self.filename.clone()), self.dist.to_string(), err)
-        })?;
-        Ok(Metadata21::parse(&dist_info)?)
-    }
-}
diff --git a/crates/puffin-distribution/src/error.rs b/crates/puffin-distribution/src/error.rs
index f5e9a8a8a..f77e16e84 100644
--- a/crates/puffin-distribution/src/error.rs
+++ b/crates/puffin-distribution/src/error.rs
@@ -1,19 +1,9 @@
-use distribution_filename::WheelFilename;
-
 #[derive(thiserror::Error, Debug)]
-pub enum Error {
+pub(crate) enum Error {
     #[error(transparent)]
     IO(#[from] std::io::Error),
     #[error(transparent)]
     PypiTypes(#[from] pypi_types::Error),
     #[error(transparent)]
     Zip(#[from] zip::result::ZipError),
-    #[error("Unable to read .dist-info directory in {0} from {1}")]
-    DistInfo(
-        Box<WheelFilename>,
-        String,
-        #[source] install_wheel_rs::Error,
-    ),
-    #[error("Unable to parse wheel filename for: {0}")]
-    FilenameParse(String, #[source] anyhow::Error),
 }
diff --git a/crates/puffin-distribution/src/source/mod.rs b/crates/puffin-distribution/src/source/mod.rs
index ae48c8d85..6a1e34d4d 100644
--- a/crates/puffin-distribution/src/source/mod.rs
+++ b/crates/puffin-distribution/src/source/mod.rs
@@ -1005,7 +1005,9 @@ fn read_wheel_metadata(
     filename: &WheelFilename,
     wheel: impl Into<PathBuf>,
 ) -> Result<Metadata21, SourceDistError> {
-    let mut archive = ZipArchive::new(fs_err::File::open(wheel)?)?;
+    let file = fs_err::File::open(wheel)?;
+    let reader = std::io::BufReader::new(file);
+    let mut archive = ZipArchive::new(reader)?;
     let dist_info = read_dist_info(filename, &mut archive)?;
     Ok(Metadata21::parse(&dist_info)?)
 }