guix: fix riscv64 output naming

diff --git a/contrib/guix/libexec/build.sh b/contrib/guix/libexec/build.sh
index 4ad1bb8f6d5c6e70313cf0da90ae8d5093dc6a38..fe9fd82fe3ecc0b374cc04be052a03d85d29f71a 100755 (executable)
--- a/contrib/guix/libexec/build.sh
+++ b/contrib/guix/libexec/build.sh
@@ -314,6 +314,9 @@ mkdir -p "$DISTSRC"
         arm-linux*)
             LINUX_ARCH="-arm"
             ;;
+        riscv64-linux*)
+            LINUX_ARCH="-riscv64"
+            ;;
     esac
 
     case "$HOST" in