diff --git a/.gitignore b/.gitignore
index 0bb13b6..025fecb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@ TestResults/
 
 ## Java
 target/
+.m2repo/
 
 ## Python
 __pycache__/
@@ -29,3 +30,5 @@ __pycache__/
 .venv/
 .pytest_cache/
 .ruff_cache/
+.uv-cache/
+.uv-managed-python/
diff --git a/java/mise.toml b/java/mise.toml
index ddcb511..9b1231b 100644
--- a/java/mise.toml
+++ b/java/mise.toml
@@ -1,3 +1,7 @@
 [tools]
 java = "temurin-21.0.9+10.0.LTS"
 maven = "3.9.16"
+
+[env]
+# Keep the Maven local repository inside the workspace (sandboxes often block ~/.m2)
+MAVEN_OPTS = "-Dmaven.repo.local=.m2repo"
diff --git a/python/mise.toml b/python/mise.toml
index 509612f..cda0a11 100644
--- a/python/mise.toml
+++ b/python/mise.toml
@@ -1,3 +1,8 @@
 [tools]
 python = "3.13.16"
 uv = "0.12.21"
+
+[env]
+# Keep uv caches/installs inside the workspace (sandboxes often block ~/.local/share/uv)
+UV_CACHE_DIR = "./.uv-cache"
+UV_PYTHON_INSTALL_DIR = "./.uv-managed-python"