diff --git a/hydra/mcu.json b/hydra/mcu.json
index ea340cc..7d30514 100644
--- a/hydra/mcu.json
+++ b/hydra/mcu.json
@@ -14,8 +14,7 @@
             "nixpkgs": { "type": "git", "value": "https://github.com/NixOS/nixpkgs.git nixos-24.05", "emailresponsible": false },
             "mozillaOverlay": { "type": "git", "value": "https://github.com/mozilla/nixpkgs-mozilla.git", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
-            "stabilizerSrc": { "type": "git", "value": "https://github.com/quartiq/stabilizer.git main", "emailresponsible": false },
-            "saymaMmcSrc": { "type": "git", "value": "https://github.com/sinara-hw/openMMC.git sayma-devel", "emailresponsible": false }
+            "stabilizerSrc": { "type": "git", "value": "https://github.com/quartiq/stabilizer.git main", "emailresponsible": false }
         }
     },
     "thermostat": {
diff --git a/mcu-contrib/default.nix b/mcu-contrib/default.nix
index 8073d86..b670130 100644
--- a/mcu-contrib/default.nix
+++ b/mcu-contrib/default.nix
@@ -74,28 +74,4 @@ in
         extraCargoBuildArgs = "--features pounder_v1_0";
       };
       lockin = {};
-    } //
-  {
-    # openMMC build system breaks if host compiler is not available, so do not use stdenvNoCC here
-    sayma-mmc = pkgs.stdenv.mkDerivation {
-      name = "sayma-mmc";
-      src = <saymaMmcSrc>;
-      phases = [ "unpackPhase" "buildPhase" "installPhase" ];
-      nativeBuildInputs = [ pkgs.cmake pkgs.gcc-arm-embedded ];
-      buildPhase =
-        ''
-        mkdir build
-        cd build
-        cmake .. -DBOARD=sayma -DBOARD_RTM=sayma -DVERSION= -DTARGET_CONTROLLER=LPC1776 -DCMAKE_BUILD_TYPE=Debug
-        make
-        '';
-      installPhase =
-        ''
-        mkdir $out
-        cp out/* $out
-        mkdir -p $out $out/nix-support
-        echo file binary-dist $out/openMMC.axf >> $out/nix-support/hydra-build-products
-        echo file binary-dist $out/openMMC.bin >> $out/nix-support/hydra-build-products
-        '';
-    };
-  }
+    }