diff --git a/artiq-fast/conda-windows/llvm-or1k.nix b/artiq-fast/conda-windows/llvm-or1k.nix
index e51307e..8594289 100644
--- a/artiq-fast/conda-windows/llvm-or1k.nix
+++ b/artiq-fast/conda-windows/llvm-or1k.nix
@@ -34,8 +34,7 @@ let
 
       requirements:
         build:
-          cmake
-
+          - cmake
       EOF
 
       cat > bld.bat << EOF