diff --git a/recipe/conda_build_config.yaml b/recipe/conda_build_config.yaml
new file mode 100644
index 0000000..408fe51
--- /dev/null
+++ b/recipe/conda_build_config.yaml
@@ -0,0 +1,26 @@
+# the builds of libcxx-testing depend on a specific
+# clang version; to test new libcxx against old clang
+# we need to build libcxx-testing for several versions.
+c_compiler_version:         # [osx]
+  - 16                      # [osx]
+  - 15                      # [osx]
+  - 14                      # [osx]
+  - 13                      # [osx]
+  - 12                      # [osx]
+  - 11                      # [osx]
+cxx_compiler_version:       # [osx]
+  - 16                      # [osx]
+  - 15                      # [osx]
+  - 14                      # [osx]
+  - 13                      # [osx]
+  - 12                      # [osx]
+  - 11                      # [osx]
+# not linked to LLVM; can stay constant,
+# but must have the same length as above
+fortran_compiler_version:   # [osx]
+  - 12                      # [osx]
+  - 12                      # [osx]
+  - 12                      # [osx]
+  - 12                      # [osx]
+  - 12                      # [osx]
+  - 12                      # [osx]
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 0d143cc..399f8c9 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -1,15 +1,18 @@
 {% set name = "libcxx-testing" %}
-{% set version = "0.2" %}
+# this number only needs to be increased if
+# there are substantial infrastructure changes
+{% set testing_generation = "0" %}
 
 package:
   name: {{ name|lower }}
-  version: {{ version }}
+  # version correspondence is: 0.{{ CLANG_MAJOR }}
+  version: {{ testing_generation }}.{{ c_compiler_version.split(".")[0] }}
 
 source:
   path: .
 
 build:
-  number: 1
+  number: 0
   skip: true  # [not (osx and python_impl == 'cpython')]
   script:
     echo "works!"