From d75b20d22540d0df74451db0160b1996c42263dd Mon Sep 17 00:00:00 2001
From: Fabian Kirchner <kirchner@posteo.de>
Date: Fri, 13 Oct 2023 17:00:41 +0200
Subject: install completions for bash, fish and zsh

---
 default.nix | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/default.nix b/default.nix
index 88d00fe..02dfde3 100644
--- a/default.nix
+++ b/default.nix
@@ -8,10 +8,14 @@ let
   haskellPackages = pkgs.haskellPackages.override {
     overrides = self: super: {
       anissue = (super.callCabal2nix "anissue" ./. { }).overrideAttrs (oldAttrs: {
+        nativeBuildInputs = [ pkgs.installShellFiles ];
         postInstall = ''
           exe=${oldAttrs.pname}
-          mkdir -p $out/share/bash-completion/completions
-          $out/bin/$exe --bash-completion-script $exe >$out/share/bash-completion/completions/$exe
+
+          installShellCompletion --cmd $exe  \
+            --bash <($out/bin/$exe --bash-completion-script $exe) \
+            --fish <($out/bin/$exe --fish-completion-script $exe) \
+            --zsh  <($out/bin/$exe --zsh-completion-script $exe)
         '';
       });
     };
-- 
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