diff --git a/windmill-worker/src/python_executor.rs b/windmill-worker/src/python_executor.rs
index 1180652d3..7b4ccf6cf 100644
--- a/windmill-worker/src/python_executor.rs
+++ b/windmill-worker/src/python_executor.rs
@@ -290,70 +290,8 @@ impl PyVersion {
         occupancy_metrics: &mut Option<&mut OccupancyMetrics>,
     ) -> error::Result<()> {
         let v = self.to_string_with_dot();
-        append_logs(job_id, w_id, format!("\nINSTALLING PYTHON ({})", v), db).await;
-        // Create dirs for newly installed python
-        // If we dont do this, NSJAIL will not be able to mount cache
-        // For the default version directory created during startup (main.rs)
-        DirBuilder::new()
-            .recursive(true)
-            .create(self.to_cache_dir())
-            .await
-            .expect("could not create initial worker dir");
-
-        let logs = String::new();
-
-        #[cfg(windows)]
-        let uv_cmd = "uv";
-
-        #[cfg(unix)]
-        let uv_cmd = UV_PATH.as_str();
-
-        let mut child_cmd = Command::new(uv_cmd);
-        child_cmd
-            .env_clear()
-            .env("HOME", HOME_ENV.to_string())
-            .env("PATH", PATH_ENV.to_string())
-            .envs(PROXY_ENVS.clone())
-            .args(["python", "install", v, "--python-preference=only-managed"])
-            // TODO: Do we need these?
-            .envs([("UV_PYTHON_INSTALL_DIR", PY_INSTALL_DIR)])
-            .stdout(Stdio::piped())
-            .stderr(Stdio::piped());
-
-        #[cfg(windows)]
-        {
-            child_cmd
-                .env("SystemRoot", SYSTEM_ROOT.as_str())
-                .env("USERPROFILE", crate::USERPROFILE_ENV.as_str())
-                .env(
-                    "TMP",
-                    std::env::var("TMP").unwrap_or_else(|_| String::from("/tmp")),
-                )
-                .env(
-                    "LOCALAPPDATA",
-                    std::env::var("LOCALAPPDATA")
-                        .unwrap_or_else(|_| format!("{}\\AppData\\Local", HOME_ENV.as_str())),
-                );
-        }
-
-        let child_process = start_child_process(child_cmd, "uv").await?;
-
-        append_logs(&job_id, &w_id, logs, db).await;
-        handle_child(
-            job_id,
-            db,
-            mem_peak,
-            &mut None,
-            child_process,
-            false,
-            worker_name,
-            &w_id,
-            "uv",
-            None,
-            false,
-            occupancy_metrics,
-        )
-        .await
+        append_logs(job_id, w_id, format!("\nREQUESTED PYTHON INSTALL IGNORED ({})", v), db).await;
+        Err(error::Error::BadConfig(format!("Python is managed through the NixOS system configuration. Change the Windmill instance setting to version 'unknown_system_python_version'")))
     }
     async fn find_python(self) -> error::Result<Option<String>> {
         #[cfg(windows)]
@@ -391,11 +329,11 @@ impl PyVersion {
                 "find",
                 self.to_string_with_dot(),
                 "--system",
-                "--python-preference=only-managed",
+                "--python-preference=only-system",
             ])
             .envs([
                 ("UV_PYTHON_INSTALL_DIR", PY_INSTALL_DIR),
-                ("UV_PYTHON_PREFERENCE", "only-managed"),
+                ("UV_PYTHON_PREFERENCE", "only-system"),
             ])
             // .stdout(Stdio::piped())
             .stderr(Stdio::piped())
@@ -561,7 +499,7 @@ pub async fn uv_pip_compile(
             "-p",
             &py_version.to_string_with_dot(),
             "--python-preference",
-            "only-managed",
+            "only-system",
         ]);
 
         if no_cache {