diff --git a/pkgs/by-name/in/incus-unwrapped/package.nix b/pkgs/by-name/in/incus-unwrapped/package.nix
index 43bf65bef83e..925a485a0723 100644
--- a/pkgs/by-name/in/incus-unwrapped/package.nix
+++ b/pkgs/by-name/in/incus-unwrapped/package.nix
@@ -1,6 +1,7 @@
 { lib
 , buildGoModule
 , fetchFromGitHub
+, fetchpatch
 , acl
 , cowsql
 , hwdata
@@ -27,6 +28,14 @@ buildGoModule rec {
 
   vendorHash = "sha256-YfUvkN1qUS3FFKb1wysg40WcJA8fT9SGDChSdT+xnkc=";
 
+  patches = [
+    # remove with > 0.4.0
+    (fetchpatch {
+      url = "https://github.com/lxc/incus/commit/c0200b455a1468685d762649120ce7e2bb25adc9.patch";
+      hash = "sha256-4fiSv6GcsKpdLh3iNbw3AGuDzcw1EadUvxtSjxRjtTA=";
+    })
+  ];
+
   postPatch = ''
     substituteInPlace internal/usbid/load.go \
       --replace "/usr/share/misc/usb.ids" "${hwdata}/share/hwdata/usb.ids"
@@ -77,9 +86,15 @@ buildGoModule rec {
     '';
 
   postInstall = ''
+    # use custom bash completion as it has extra logic for e.g. instance names
     installShellCompletion --bash --name incus ./scripts/bash/incus
+
+    installShellCompletion --cmd incus \
+      --fish <($out/bin/incus completion fish) \
+      --zsh <($out/bin/incus completion zsh)
   '';
 
+
   passthru = {
     tests.incus = nixosTests.incus;