diff --git a/.builds/nix.yml b/.builds/nix.yml
index 31abbf5..bd977ff 100644
--- a/.builds/nix.yml
+++ b/.builds/nix.yml
@@ -4,10 +4,4 @@ sources:
 environment:
   NIX_CONFIG: "experimental-features = nix-command flakes"
 tasks:
-  - build: nix build ./qbpm
-  - install: nix profile install ./qbpm
-  - run: |
-      mkdir -p ~/.config/qutebrowser
-      touch ~/.config/qutebrowser/config.py
-      qbpm new profile
-      qbpm list | grep profile
+  - check: nix flake check ./qbpm
diff --git a/README.md b/README.md
index 4d30176..e79ea62 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 # qutebrowser profile manager
 
+[![PyPI version](http://img.shields.io/pypi/v/qbpm.svg)](https://pypi.python.org/pypi/qbpm)
 [![builds.sr.ht status](https://builds.sr.ht/~pvsr/qbpm/commits/main.svg)](https://builds.sr.ht/~pvsr/qbpm/commits/main?)
-[![PyPI](http://img.shields.io/pypi/v/qbpm.svg)](https://pypi.python.org/pypi/qbpm)
+[![garnix build status](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fgarnix.io%2Fapi%2Fbadges%2Fpvsr%2Fqbpm)](https://garnix.io/repo/pvsr/qbpm)
 
 qbpm (qutebrowser profile manager) is a tool for creating, managing, and running
 [qutebrowser](https://github.com/qutebrowser/qutebrowser) profiles. Profile support
diff --git a/flake.nix b/flake.nix
index dbb2d13..f3da4a8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -38,7 +38,14 @@
             pkgs.installShellFiles
           ];
           nativeCheckInputs = [ pkgs.python3.pkgs.pytestCheckHook ];
-          postInstallCheck = "$out/bin/qbpm --help";
+          postInstallCheck = ''
+            $out/bin/qbpm --help >/dev/null
+            export HOME=$(mktemp -d)
+            mkdir -p ~/.config/qutebrowser
+            touch ~/.config/qutebrowser/config.py
+            $out/bin/qbpm new profile
+            $out/bin/qbpm list | grep profile
+          '';
           postInstall = ''
             _QBPM_COMPLETE=bash_source $out/bin/qbpm > completions/qbpm.bash
             _QBPM_COMPLETE=zsh_source $out/bin/qbpm > completions/qbpm.zsh
@@ -65,6 +72,8 @@
         default = self.apps.${pkgs.system}.qbpm;
       });
 
+      checks = forAllSystems (pkgs: self.packages.${pkgs.system});
+
       devShells = forAllSystems (pkgs: {
         default = pkgs.mkShell {
           packages = [