diff --git a/pkgs/by-name/pine64-alsa-ucm/package.nix b/pkgs/by-name/pine64-alsa-ucm/package.nix
index 4ed194705..24aa620c5 100644
--- a/pkgs/by-name/pine64-alsa-ucm/package.nix
+++ b/pkgs/by-name/pine64-alsa-ucm/package.nix
@@ -28,4 +28,20 @@ stdenv.mkDerivation {
 
     runHook postInstall
   '';
+
+  # paths in alsa are always relative to the root ucm;
+  # since we moved stuff around, we have to fix it:
+  fixupPhase = ''
+    runHook preFixup
+
+    substituteInPlace $out/share/alsa/ucm2/Allwinner/A64/PinePhone/PinePhone.conf \
+      --replace-fail '"HiFi.conf"' '"/Allwinner/A64/PinePhone/HiFi.conf"' \
+      --replace-fail '"VoiceCall.conf"' '"/Allwinner/A64/PinePhone/VoiceCall.conf"'
+
+    substituteInPlace $out/share/alsa/ucm2/Rockchip/rk3399/PinePhonePro/PinePhonePro.conf \
+      --replace-fail '"HiFi.conf"' '"/Rockchip/rk3399/PinePhonePro/HiFi.conf"' \
+      --replace-fail '"VoiceCall.conf"' '"/Rockchip/rk3399/PinePhonePro/VoiceCall.conf"'
+
+    runHook postFixup
+  '';
 }