diff --git a/.gear/tuwunel.spec b/.gear/tuwunel.spec
index 4fdea0136..2ba3c84f5 100644
--- a/.gear/tuwunel.spec
+++ b/.gear/tuwunel.spec
@@ -28,7 +28,7 @@ fully implementing the Matrix Specification for all but the most niche uses.
 
 %prep
 %setup -a1
-mv %SOURCE2 .cargo/
+cat %SOURCE2 >> .cargo/config.toml
 #%%rust_prep
 
 %build