diff --git a/pkgs/tools/misc/kermit/default.nix b/pkgs/tools/misc/kermit/default.nix
index f81d9b7266b6..ddb51adc6c93 100644
--- a/pkgs/tools/misc/kermit/default.nix
+++ b/pkgs/tools/misc/kermit/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
       -e 's@/usr/local@'"$out"@ makefile
   '';
 
-  buildPhase = "make -f makefile linux LNKFLAGS='-lcrypt -lresolv'";
+  buildPhase = "make -f makefile linux KFLAGS='-D_IO_file_flags' LNKFLAGS='-lcrypt -lresolv'";
 
   installPhase = ''
     mkdir -p $out/bin
@@ -35,6 +35,5 @@ stdenv.mkDerivation {
     license = licenses.bsd3;
     maintainers = with maintainers; [ pSub ];
     platforms = with platforms; linux;
-    broken = true;
   };
 }