diff --git a/pkgs/development/compilers/sbcl/1.2.0.nix b/pkgs/development/compilers/sbcl/1.2.0.nix
index d19edce2c105..975cb7db1bbf 100644
--- a/pkgs/development/compilers/sbcl/1.2.0.nix
+++ b/pkgs/development/compilers/sbcl/1.2.0.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
       sh make.sh clisp --prefix=$out
     ''
     else ''
-      sh make.sh --prefix=$out --xc-host='${sbclBootstrap}/bin/sbcl --core ${sbclBootstrap}/share/sbcl/sbcl.core --disable-debugger --no-userinit --no-sysinit'
+      sh make.sh --prefix=$out --xc-host='${sbclBootstrap}/bin/sbcl --disable-debugger --no-userinit --no-sysinit'
     '';
 
   installPhase = ''
diff --git a/pkgs/development/compilers/sbcl/1.2.5.nix b/pkgs/development/compilers/sbcl/1.2.5.nix
index 6c0fa874f3eb..68ed58b426f6 100644
--- a/pkgs/development/compilers/sbcl/1.2.5.nix
+++ b/pkgs/development/compilers/sbcl/1.2.5.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
       sh make.sh clisp --prefix=$out
     ''
     else ''
-      sh make.sh --prefix=$out --xc-host='${sbclBootstrap}/bin/sbcl --core ${sbclBootstrap}/share/sbcl/sbcl.core --disable-debugger --no-userinit --no-sysinit'
+      sh make.sh --prefix=$out --xc-host='${sbclBootstrap}/bin/sbcl --disable-debugger --no-userinit --no-sysinit'
     '';
 
   installPhase = ''