GUIDELINES: note about CONDA_PY in build string

acaprez · Jun 17, 2016 · 8c0b247 · 8c0b247
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diff --git a/GUIDELINES.md b/GUIDELINES.md
@@ -160,6 +160,10 @@ Examples:
 
 * confirm expected text in stderr: [weblogo](recipes/weblogo)
 
+If a package depends on Python and has a custom build string, then
+`py{{CONDA_PY}}` must be contained in that build string. Otherwise Python will
+be automatically pinned to one minor version, resulting in dependency conflicts
+with other packages. See [mapsplice](recipes/mapsplice) for an example of this.
 
 ### Metapackages