Only build R recipes with r-base versions provided by conda-forge.
[skip lint]
@@ -42,4 +42,4 @@ popd > /dev/null
echo ""
# We just want to build all of the recipes.
-conda build-all ./recipes --matrix-condition "numpy >=1.11" "python >=2.7,<3|>=3.5" "r-base >=3.3.2"
+conda build-all ./recipes --matrix-condition "numpy >=1.11" "python >=2.7,<3|>=3.5" "r-base ==3.3.2|==3.4.1"
