diff --git a/Makefile.am b/Makefile.am
index 835cedb..9b7a78d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -110,7 +110,7 @@ winpkg: $(bin_PROGRAMS)
 	cp .libs/stoken.exe winpkg/
 if ENABLE_GUI
 	cp .libs/stoken-gui.exe winpkg/
-	cp `./win32deps.pl .libs/stoken-gui.exe` winpkg/
+	cp `CC=$(CC) ./win32deps.pl .libs/stoken-gui.exe` winpkg/
 	cp gui/*.{ui,png} winpkg/
 else
 	cp .libs/stoken.exe winpkg/
diff --git a/README.md b/README.md
index e0e1649..e4c573c 100644
--- a/README.md
+++ b/README.md
@@ -113,18 +113,17 @@ or maintained regularly.
 
 #### Initial setup
 
-On a Fedora 20 PC (other versions may work as well), install the build
+On a Fedora 28 PC (other versions may work as well), install the build
 dependencies:
 
-    yum groupinstall "Development Tools"
-    yum install git autoconf automake libtool mingw32-gnutls mingw32-libxml2 mingw32-gtk3
+    dnf install git autoconf automake libtool mingw64-gnutls mingw64-libxml2 mingw64-gtk3 mingw64-binutils
 
 #### Compiling
 
     git clone git://github.com/cernekee/stoken
     cd stoken
     bash autogen.sh
-    mingw32-configure
+    mingw64-configure GTK_LIBS="$(x86_64-w64-mingw32-pkg-config --libs "gtk+-3.0") -Wl,--subsystem,windows"
     make winpkg
 
 If all goes well, you should be able to copy <code>winpkg.zip</code> to
diff --git a/win32deps.pl b/win32deps.pl
index 5561a57..1f9161f 100755
--- a/win32deps.pl
+++ b/win32deps.pl
@@ -35,8 +35,8 @@
 	"setupapi.dll" => 1,
 );
 
-my $CC = "i686-w64-mingw32-gcc";
-my $OBJDUMP = "mingw-objdump";
+my $CC = $ENV{'CC'};
+my $OBJDUMP = $ENV{'OBJDUMP'} // $CC =~ s/-gcc$/-objdump/r;
 
 sub run($)
 {