diff --git a/.ci/prep_azure.py b/.ci/prep_azure.py
index 296355aa..a7d8bc67 100755
--- a/.ci/prep_azure.py
+++ b/.ci/prep_azure.py
@@ -7,27 +7,28 @@ import ci_lib
 
 batches = []
 
-batches += [
-    [
-        "sudo chown `whoami`: ~",
-        "chmod u=rwx,g=rx,o= ~",
+if os.uname()[0] == 'Linux':
+    batches += [
+        [
+            "sudo chown `whoami`: ~",
+            "chmod u=rwx,g=rx,o= ~",
 
-        "sudo mkdir /var/run/sshd",
-        "sudo /etc/init.d/ssh start",
+            "sudo mkdir /var/run/sshd",
+            "sudo /etc/init.d/ssh start",
 
-        "mkdir -p ~/.ssh",
-        "chmod u=rwx,go= ~/.ssh",
+            "mkdir -p ~/.ssh",
+            "chmod u=rwx,go= ~/.ssh",
 
-        "ssh-keyscan -H localhost >> ~/.ssh/known_hosts",
-        "chmod u=rw,go= ~/.ssh/known_hosts",
+            "ssh-keyscan -H localhost >> ~/.ssh/known_hosts",
+            "chmod u=rw,go= ~/.ssh/known_hosts",
 
-        "cat tests/data/docker/mitogen__has_sudo_pubkey.key > ~/.ssh/id_rsa",
-        "chmod u=rw,go= ~/.ssh/id_rsa",
+            "cat tests/data/docker/mitogen__has_sudo_pubkey.key > ~/.ssh/id_rsa",
+            "chmod u=rw,go= ~/.ssh/id_rsa",
 
-        "cat tests/data/docker/mitogen__has_sudo_pubkey.key.pub > ~/.ssh/authorized_keys",
-        "chmod u=rw,go=r ~/.ssh/authorized_keys",
+            "cat tests/data/docker/mitogen__has_sudo_pubkey.key.pub > ~/.ssh/authorized_keys",
+            "chmod u=rw,go=r ~/.ssh/authorized_keys",
+        ]
     ]
-]
 
 if ci_lib.have_apt():
     batches.append([