diff --git a/envs/bwa.yml b/envs/bwa.yml
index fc518ab504fb02b4a06d459c1d02205de153231f..e4ffe2a79cf2c36fe6c1269e1d2572962d4b3144 100644
--- a/envs/bwa.yml
+++ b/envs/bwa.yml
@@ -18,7 +18,7 @@ dependencies:
 - setuptools=36.6.0=py36_1
 - sqlite=3.13.0=1
 - tk=8.5.19=2
-- wheel=0.30.0=py_1
+- wheel=0.30.0
 - xz=5.2.3=0
 - zlib=1.2.8=3
 - libgcc=5.2.0=0