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-rw-r--r--pkgs/development/r-modules/generic-builder.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/r-modules/generic-builder.nix b/pkgs/development/r-modules/generic-builder.nix
index 05c069383e7..5939a425aef 100644
--- a/pkgs/development/r-modules/generic-builder.nix
+++ b/pkgs/development/r-modules/generic-builder.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation ({
                 lib.optionals requireX [util-linux xvfb-run] ++
                 lib.optionals stdenv.isDarwin [Cocoa Foundation gfortran libiconv];
 
-  NIX_CFLAGS_COMPILE =
+  env.NIX_CFLAGS_COMPILE =
     lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
 
   configurePhase = ''