diff --git a/pkgs/applications/version-management/git-and-tools/git-ignore/default.nix b/pkgs/applications/version-management/git-and-tools/git-ignore/default.nix
index 5ff6d6b1f84b..98da70a274e4 100644
--- a/pkgs/applications/version-management/git-and-tools/git-ignore/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-ignore/default.nix
@@ -4,16 +4,16 @@ with rustPlatform;
 
 buildRustPackage rec {
   pname = "git-ignore";
-  version = "1.1.1";
+  version = "1.2.0";
 
   src = fetchFromGitHub {
     owner = "sondr3";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-bKIBPqGKiS3ey8vH2F4EoleV1H2PTOp+71d/YW3jkT0=";
+    sha256 = "sha256-Bfr+4zDi6QqirlqccW1jU95eb4q82ZFG9LtT2mCPYLc=";
   };
 
-  cargoSha256 = "sha256-7jPNVBf5DYtE8nsh7LIywMCjU7ODZ3qFsmBie2mZ3h8=";
+  cargoSha256 = "sha256-ehEUI4M2IxqS6QhyqOncwP+w6IGbIlSFNIP/FEVH/JI=";
 
   nativeBuildInputs = [ pkg-config installShellFiles ];
   buildInputs = [ openssl ]
@@ -21,9 +21,10 @@ buildRustPackage rec {
     darwin.apple_sdk.frameworks.Security
   ];
 
-  outputs = [ "out" "man" ];
-  preFixup = ''
-    installManPage $releaseDir/build/git-ignore-*/out/git-ignore.1
+  postInstall = ''
+    installManPage assets/git-ignore.1
+    # There's also .elv and .ps1 completion files but I don't know where to install those
+    installShellCompletion assets/git-ignore.{bash,fish} --zsh assets/_git-ignore
   '';
 
   meta = with lib; {