diff --git a/build/configure/src/python.rs b/build/configure/src/python.rs
index 9d5e9057e..e43bceeb3 100644
--- a/build/configure/src/python.rs
+++ b/build/configure/src/python.rs
@@ -1,8 +1,6 @@
 // Copyright: Ankitects Pty Ltd and contributors
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
-use std::env;
-
 use anyhow::Result;
 use ninja_gen::action::BuildAction;
 use ninja_gen::archives::Platform;
@@ -125,7 +123,14 @@ impl BuildAction for BuildWheel {
     }
 
     fn files(&mut self, build: &mut impl FilesHandle) {
-        build.add_inputs("uv", inputs![":uv_binary"]);
+        if std::env::var("OFFLINE_BUILD").ok().as_deref() == Some("1") {
+            let uv_path =
+                std::env::var("UV_BINARY").expect("UV_BINARY must be set in OFFLINE_BUILD mode");
+            build.add_inputs("uv", inputs![uv_path]);
+        } else {
+            build.add_inputs("uv", inputs![":uv_binary"]);
+        }
+
         build.add_inputs("", &self.deps);
 
         // Set the project directory based on which package we're building
@@ -222,15 +227,19 @@ struct Sphinx {
 
 impl BuildAction for Sphinx {
     fn command(&self) -> &str {
-        if env::var("OFFLINE_BUILD").is_err() {
-            "$uv sync --extra sphinx && $python python/sphinx/build.py"
-        } else {
+        if std::env::var("OFFLINE_BUILD").ok().as_deref() == Some("1") {
             "$python python/sphinx/build.py"
+        } else {
+            "$uv sync --extra sphinx && $python python/sphinx/build.py"
         }
     }
 
     fn files(&mut self, build: &mut impl FilesHandle) {
-        if env::var("OFFLINE_BUILD").is_err() {
+        if std::env::var("OFFLINE_BUILD").ok().as_deref() == Some("1") {
+            let uv_path =
+                std::env::var("UV_BINARY").expect("UV_BINARY must be set in OFFLINE_BUILD mode");
+            build.add_inputs("uv", inputs![uv_path]);
+        } else {
             build.add_inputs("uv", inputs![":uv_binary"]);
             // Set environment variable to use the existing pyenv
             build.add_variable("pyenv_path", "$builddir/pyenv");