diff --git a/.gitignore b/.gitignore
index b60b1d0..6a36964 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,6 @@ ms.pdf
 dag.pdf
 
 .idea
+
+# Mac OSX
+.DS_Store
diff --git a/environment.yml b/environment.yml
index 8fdab70..f07e254 100644
--- a/environment.yml
+++ b/environment.yml
@@ -4,6 +4,9 @@ channels:
   - defaults
   - conda-forge
 
+variables:
+  PYTHONNOUSERSITE: "1"
+
 dependencies:
   - gammapy=0.19
   - iminuit=2.8.4