diff --git a/pkgs/development/rocq-modules/math-classes/default.nix b/pkgs/development/rocq-modules/math-classes/default.nix
index 1d5b42eb7ef2..0c156dce69f0 100644
--- a/pkgs/development/rocq-modules/math-classes/default.nix
+++ b/pkgs/development/rocq-modules/math-classes/default.nix
@@ -11,24 +11,17 @@ mkCoqDerivation {
   pname = "math-classes";
   inherit version;
   defaultVersion =
+    let
+      case = case: out: { inherit case out; };
+    in
     with lib.versions;
     lib.switch coq.coq-version [
-      {
-        case = range "8.17" "8.20";
-        out = "8.19.0";
-      }
-      {
-        case = range "8.12" "8.18";
-        out = "8.18.0";
-      }
-      {
-        case = range "8.12" "8.17";
-        out = "8.17.0";
-      }
-      {
-        case = range "8.6" "8.16";
-        out = "8.15.0";
-      }
+      (case (range "9.0" "9.3") "9.2.0")
+      (case (range "9.0" "9.1") "9.0.0")
+      (case (range "8.17" "8.20") "8.19.0")
+      (case (range "8.12" "8.18") "8.18.0")
+      (case (range "8.12" "8.17") "8.17.0")
+      (case (range "8.6" "8.16") "8.15.0")
     ] null;
   release."8.12.0".hash = "sha256:14nd6a08zncrl5yg2gzk0xf4iinwq4hxnsgm4fyv07ydbkxfb425";
   release."8.13.0".hash = "sha256:1ln7ziivfbxzbdvlhbvyg3v30jgblncmwcsam6gg3d1zz6r7cbby";
@@ -36,6 +29,8 @@ mkCoqDerivation {
   release."8.17.0".hash = "sha256-WklL8pgYTd0l4TGt7h7tWj1qcFcXvoPn25+XKF1pIKA=";
   release."8.18.0".hash = "sha256-0WwPss8+Vr37zX616xeuS4TvtImtSbToFQkQostIjO8=";
   release."8.19.0".hash = "sha256-rsV96W9MPFi/DKsepNPm1QnC2DMemio+uALIgzVYw0w=";
+  release."9.0.0".hash = "sha256-b8GPb1MRg5ZLieDTaoozy6ju10FhVdb6/XhKmyac1V4=";
+  release."9.2.0".hash = "sha256-NdmZcaNg0AmJXRsB3reyxrOYOnj/ZHgv3kF9Bxw+Q3I=";
 
   mlPlugin = true; # uses coq-bignums.plugin