diff --git a/conda/beat-devel/meta.yaml b/conda/beat-devel/meta.yaml
index e44a0d71e4cd2dc45d6ee14550954a97256362f4..aa57a91ef9e43e7f7d3fe3f70c23a8328df771ed 100644
--- a/conda/beat-devel/meta.yaml
+++ b/conda/beat-devel/meta.yaml
@@ -2,7 +2,7 @@
 {% set nopin = ['ca-certificates', 'certifi', 'openssl', 'libstdcxx-ng', 'libgcc-ng', 'libcxx', 'libcxxabi'] %}
 package:
   name: beat-devel
-  version: 2021.07.14
+  version: 2021.08.31
 
 build:
   # the build number must be zero all the time.
@@ -14,7 +14,7 @@ build:
 
 requirements:
   host:
-    - bob-devel 2021.07.14
+    - bob-devel 2021.08.31
     - python {{ python }}
     # the dependencies are pinned in bob-devel
     - docker-py
diff --git a/conda/bob-devel/meta.yaml b/conda/bob-devel/meta.yaml
index 3088db5621856809bec5847bc870a086c570e100..b71754cd7ce2bde8aad3a023f09d7797e8acd962 100644
--- a/conda/bob-devel/meta.yaml
+++ b/conda/bob-devel/meta.yaml
@@ -6,7 +6,7 @@ package:
   # there as well in the same merge request.
   # Then open an MR in bob/bob.devtools to put these new versions of bob-devel and
   # beat-devel in `bob/devtools/data/conda_build_config.yaml`
-  version: 2021.07.14
+  version: 2021.08.31
 
 build:
   # the build number must be zero all the time.
@@ -19,6 +19,8 @@ build:
 requirements:
   host:
     - python {{ python }}
+    - {{ compiler('c') }}
+    - {{ compiler('cxx') }}
 
     # Dependency list of bob and beat packages. Everything is pinned to allow
     # for better reproducibility.