diff --git a/pkgs/tools/networking/flannel/plugin.nix b/pkgs/tools/networking/flannel/plugin.nix
index 51e29a31ddc5..db55a3dfd04c 100644
--- a/pkgs/tools/networking/flannel/plugin.nix
+++ b/pkgs/tools/networking/flannel/plugin.nix
@@ -2,22 +2,29 @@
 
 buildGoModule rec {
   pname = "cni-plugin-flannel";
-  version = "1.1";
+  version = "1.0.0";
 
   src = fetchFromGitHub {
     owner = "flannel-io";
     repo = "cni-plugin";
     rev = "v${version}";
-    sha256 = "sha256-DZC6uJR6TIHdmu8kZcbM+RC7pdejqLCOep0v3PM8/QY=";
+    sha256 = "sha256-zWxw4LZIlkT88yGTnxdupq7cUSacNRxPzzp01O9USDw=";
   };
 
-  vendorSha256 = "sha256-TLAwE3pTnJYOi1AsOQfsG6t3xLKOah/7DvYjsqyltKs=";
+  vendorSha256 = "sha256-zteMlrvRTVxOFlBy+z/qfiSii8+c8PMapwIsdbN+Aig=";
 
   postInstall = ''
     mv $out/bin/cni-plugin $out/bin/flannel
   '';
 
   doCheck = false;
+  doInstallCheck = true;
+
+  installCheckPhase = ''
+    runHook preInstallCheck
+    $out/bin/flannel 2>&1 | fgrep -q v$version
+    runHook postInstallCheck
+  '';
 
   meta = with lib; {
     description = "flannel CNI plugin";