diff --git a/k3s-install.spec b/k3s-install.spec
index 091b135..d2cf667 100644
--- a/k3s-install.spec
+++ b/k3s-install.spec
@@ -54,7 +54,7 @@ distribution that differs from the original Kubernetes (colloquially
     TLS and options.
 
 %prep
-%autosetup -p1 -n k3s-%{version}
+%autosetup -p1 -n k3s-%(echo %{version} | tr '+' '-')
 
 %build