diff --git a/nixos/modules/services/monitoring/prometheus/exporters/imap-mailstat.nix b/nixos/modules/services/monitoring/prometheus/exporters/imap-mailstat.nix
index c5d97dc12238..eaec8041d294 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters/imap-mailstat.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters/imap-mailstat.nix
@@ -94,8 +94,8 @@ in
     serviceConfig = {
       ExecStart = ''
         ${pkgs.prometheus-imap-mailstat-exporter}/bin/imap-mailstat-exporter \
-          -config ${createConfigFile cfg.accounts} \
-          ${optionalString cfg.oldestUnseenDate "-oldestunseendate"} \
+          --config.file="${createConfigFile cfg.accounts}" \
+          ${optionalString cfg.oldestUnseenDate "--oldestunseen.feature"} \
           ${concatStringsSep " \\\n  " cfg.extraFlags}
       '';
     };
diff --git a/pkgs/by-name/pr/prometheus-imap-mailstat-exporter/package.nix b/pkgs/by-name/pr/prometheus-imap-mailstat-exporter/package.nix
index eab71766d14c..104b52d01c0f 100644
--- a/pkgs/by-name/pr/prometheus-imap-mailstat-exporter/package.nix
+++ b/pkgs/by-name/pr/prometheus-imap-mailstat-exporter/package.nix
@@ -7,16 +7,16 @@
 
 buildGoModule rec {
   pname = "imap-mailstat-exporter";
-  version = "0.0.1";
+  version = "0.7.1";
 
   src = fetchFromGitHub {
     owner = "bt909";
     repo = "imap-mailstat-exporter";
-    tag = "v${version}";
-    hash = "sha256-aR/94C9SI+FPs3zg3bpexmgGYrhxghyHwpXj25x0yuw=";
+    tag = "${version}";
+    hash = "sha256-dinHRHoTVc/0Lu+TzzmfoCyoDZQQhXw8AOlgbH46hm0=";
   };
 
-  vendorHash = "sha256-M5Ho4CiO5DC6mWzenXEo2pu0WLHj5S8AV3oEFwD31Sw=";
+  vendorHash = "sha256-k3FjfIaNm6408I4uqmJpZsGgMiHel+NUtBclbGKTtZ4=";
 
   nativeBuildInputs = [ installShellFiles ];