diff --git a/hosts/oswald/system.scm b/hosts/oswald/system.scm
index 34280b6..3af941d 100644
--- a/hosts/oswald/system.scm
+++ b/hosts/oswald/system.scm
@@ -19,13 +19,13 @@
   (package
     (inherit u-boot-rock64-rk3328)
     (arguments
-     (substitute-keyword-arguments (package-arguments u-boot-rock64-rk3328)
-       ((#:phases phases)
-        `(modify-phases ,phases
-           (add-after 'unpack 'change-ddr-clock
-             (lambda _
-               (substitute* "arch/arm/dts/rk3328-rock64-u-boot.dtsi"
-                 (("rk3328-sdram-lpddr3-1600.dtsi") "rk3328-sdram-lpddr3-666.dtsi"))))))))))
+      (substitute-keyword-arguments (package-arguments u-boot-rock64-rk3328)
+        ((#:phases phases)
+         #~(modify-phases #$phases
+             (add-after 'unpack 'change-ddr-clock
+               (lambda _
+                 (substitute* "arch/arm/dts/rk3328-rock64-u-boot.dtsi"
+                   (("rk3328-sdram-lpddr3-1600.dtsi") "rk3328-sdram-lpddr3-666.dtsi"))))))))))
 
 (define chrony-config "\
 pool pool.ntp.org iburst