diff --git a/dev/conda/pkgs-R.yaml b/dev/conda/pkgs-R.yaml
index c414fb3e6..9e6659541 100644
--- a/dev/conda/pkgs-R.yaml
+++ b/dev/conda/pkgs-R.yaml
@@ -5,7 +5,7 @@ COMMENT(          custom-built emews-rinside                )m4_dnl
 COMMENT( Other platforms simply install r and build RInside )m4_dnl
 COMMENT(      inside build-generic.sh                       )m4_dnl
 COMMENT( Retain indentation                                 )m4_dnl
-m4_ifelse(getenv(PLATFORM),`osx-arm64',
+m4_ifelse(getenv(CONDA_PLATFORM),`osx-arm64',
 `    - swift-t::emews-rinside',
 `    - r=getenv(R_VERSION)'
 )