diff --git a/pkgs/development/coq-modules/extructures/default.nix b/pkgs/development/coq-modules/extructures/default.nix
index 7240ffdf0dba..8d28d9b0f6cf 100644
--- a/pkgs/development/coq-modules/extructures/default.nix
+++ b/pkgs/development/coq-modules/extructures/default.nix
@@ -9,6 +9,7 @@
 
   inherit version;
   defaultVersion = with lib.versions; lib.switch [coq.coq-version ssreflect.version] [
+    { cases = [(range "8.17" "8.18") (isGe "2.0.0")  ]; out = "0.4.0"; }
     { cases = [(range "8.11" "8.18") (isGe "1.12.0") ]; out = "0.3.1"; }
     { cases = [(range "8.11" "8.14") (isLe "1.12.0") ]; out = "0.3.0"; }
     { cases = [(range "8.10" "8.12") (isLe "1.12.0") ]; out = "0.2.2"; }
@@ -16,6 +17,7 @@
 
   releaseRev = v: "v${v}";
 
+  release."0.4.0".sha256 = "sha256:1jbvawwmmczf9algdq81iqnrlmwwl8cxhwyrsi1kq3fmpvanx2f1";
   release."0.3.1".sha256 = "sha256-KcuG/11Yq5ACem4FyVnQqHKvy3tNK7hd0ir2SJzzMN0=";
   release."0.3.0".sha256 = "sha256:14rm0726f1732ldds495qavg26gsn30w6dfdn36xb12g5kzavp38";
   release."0.2.2".sha256 = "sha256:1clzza73gccy6p6l95n6gs0adkqd3h4wgl4qg5l0qm4q140grvm7";