diff --git a/pkgs/mempool/default.nix b/pkgs/mempool/default.nix
index 1a45785..8270b85 100644
--- a/pkgs/mempool/default.nix
+++ b/pkgs/mempool/default.nix
@@ -14,10 +14,12 @@ rec {
   nodejs = nodejs-18_x;
   nodejsRuntime = nodejs-slim-18_x;
 
+  version = "2.5.0";
+
   src = fetchFromGitHub {
     owner = "mempool";
     repo = "mempool";
-    rev = "v2.5.0";
+    tag = "v${version}";
     hash = "sha256-8HmfytxRte3fQ0QKOljUVk9YAuaXhQQWuv3EFNmOgfQ=";
   };
 
@@ -108,8 +110,7 @@ rec {
   sync = "${rsync}/bin/rsync -a --inplace";
 
   mkDerivationMempool = args: stdenvNoCC.mkDerivation ({
-    version = src.rev;
-    inherit src meta;
+    inherit version src meta;
 
     nativeBuildInputs = [
       makeWrapper
diff --git a/pkgs/mempool/generate.sh b/pkgs/mempool/generate.sh
index f491a04..7fce668 100755
--- a/pkgs/mempool/generate.sh
+++ b/pkgs/mempool/generate.sh
@@ -40,9 +40,9 @@ updateSrc() {
     hash=$(nix hash path "$src")
 
     sed -i "
+      s|\bversion = .*;|version = \"$version\";|
       s|\bowner = .*;|owner = \"$owner\";|
-      s|\brev = .*;|rev = \"$rev\";|
-      s|\bhash = .*;|hash = \"$hash\";|
+      /fetchFromGitHub/,/hash/ s|\bhash = .*;|hash = \"$hash\";|
     " default.nix
 }