Use stable toolchain for illumos

jasonbking · jasonbking · commit f7928f88360c · 2021-03-05T03:54:12.000Z
diff --git a/.cirrus.yml b/.cirrus.yml
@@ -176,6 +176,7 @@ task:
     - name: illumos x86_64
       env:
         TARGET: x86_64-unknown-illumos
+        TOOLCHAIN: stable
   container:
     image: rust:1.40
   setup_script:
