diff --git a/.ci_support/linux_64_.yaml b/.ci_support/linux_64_.yaml
index 3166d1d..6c59082 100644
--- a/.ci_support/linux_64_.yaml
+++ b/.ci_support/linux_64_.yaml
@@ -1,7 +1,3 @@
-c_stdlib:
-- sysroot
-c_stdlib_version:
-- '2.12'
 cdt_name:
 - cos6
 channel_sources:
@@ -10,6 +6,3 @@ channel_targets:
 - conda-forge main
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
-zip_keys:
-- - c_stdlib_version
-  - cdt_name