diff --git a/derivation.nix b/derivation.nix
index 6dc2e04..caa8a1d 100644
--- a/derivation.nix
+++ b/derivation.nix
@@ -1,4 +1,5 @@
 { pkgs
+, lib
 , stdenvNoCC
 , cxx ? pkgs.gfortran12
 , cc ? pkgs.gfortran12
@@ -8,6 +9,8 @@
 , python39Packages
 , gtest
 , src ? { outPath = ./../icon-charm; }
+, cIfaceSupport ? false
+, fortranIfaceSupport ? false
 }:
 
 stdenvNoCC.mkDerivation {
@@ -30,7 +33,15 @@ stdenvNoCC.mkDerivation {
     "-DCMAKE_CXX_COMPILER=${cxx}/bin/c++"
     "-DCMAKE_C_COMPILER=${cc}/bin/cc"
     "-DCMAKE_FORTRAN_COMPILER=${f77}/bin/f77"
-    "-DMM_ENABLE_FORTRAN:BOOL=OFF"
+  ] ++ lib.optional (cIfaceSupport && !fortranIfaceSupport) [
+    "-DMM_ENABLE_C=ON"
+  ] ++ lib.optional fortranIfaceSupport [
+    "-DMM_ENABLE_C=ON"
+    "-DMM_ENABLE_FORTRAN=ON"
+  ] ++ lib.optional (!fortranIfaceSupport) [
+    "-DMM_ENABLE_FORTRAN=OFF"
+  ] ++ lib.optional (!cIfaceSupport && !fortranIfaceSupport) [
+    "-DMM_ENABLE_C=OFF"
   ];
 
   doCheck = true;