diff --git a/conda/artiq-dev/meta.yaml b/conda/artiq-dev/meta.yaml
index 962c8804f..a08765fa5 100644
--- a/conda/artiq-dev/meta.yaml
+++ b/conda/artiq-dev/meta.yaml
@@ -20,7 +20,7 @@ requirements:
     - binutils-or1k-linux >=2.27
     - llvm-or1k
     - llvmlite-artiq 0.12.0.dev py35_30
-    - rust-core-or1k 1.18.0 14
+    - rust-core-or1k 1.18.0 15
     - cargo 0.11.0
     - openocd >=0.10
     - lit