diff --git a/configure b/configure
index c270f25..83cbdd7 100755
--- a/configure
+++ b/configure
@@ -3737,8 +3737,18 @@ _ACEOF
   LIBS="-lgmp $LIBS"
 
 else
-  { { echo "$as_me:$LINENO: error: Cannot find libgmp" >&5
-echo "$as_me: error: Cannot find libgmp" >&2;}
+  { { echo "$as_me:$LINENO: error:
+ERROR: Cannot find libgmp.
+ERROR: You might want to supply CFLAGS=-I</path/to/include> (containing
+ERROR: the gmp.h header file), and LDFLAGS=-L</path/to/lib> (containing
+ERROR: libgmp.so) if libgmp is installed in a non-standard location.
+ERROR: libgmp can be obtained from <http://gmplib.org>. " >&5
+echo "$as_me: error:
+ERROR: Cannot find libgmp.
+ERROR: You might want to supply CFLAGS=-I</path/to/include> (containing
+ERROR: the gmp.h header file), and LDFLAGS=-L</path/to/lib> (containing
+ERROR: libgmp.so) if libgmp is installed in a non-standard location.
+ERROR: libgmp can be obtained from <http://gmplib.org>. " >&2;}
    { (exit 1); exit 1; }; }
 fi
 ac_cv_lib_gmp=ac_cv_lib_gmp_main
diff --git a/configure.ac b/configure.ac
index 008a5e9..cd28f1a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,12 @@ case "$target_os" in
   esac
 
 # Checks for libraries.
-AC_HAVE_LIBRARY([gmp],,[AC_MSG_ERROR([Cannot find libgmp])])
+AC_HAVE_LIBRARY([gmp],,[AC_MSG_ERROR([
+ERROR: Cannot find libgmp. 
+ERROR: You might want to supply CFLAGS=-I</path/to/include> (containing
+ERROR: the gmp.h header file), and LDFLAGS=-L</path/to/lib> (containing
+ERROR: libgmp.so) if libgmp is installed in a non-standard location.
+ERROR: libgmp can be obtained from <http://gmplib.org>. ])])
 AC_SEARCH_LIBS(dlsym, dl,, [AC_MSG_ERROR([Cannot find libdl])])
 AC_SEARCH_LIBS(cos, m,, [AC_MSG_ERROR([Cannot find libm])])
 
diff --git a/scheme/Makefile.am b/scheme/Makefile.am
index 0a1ffb7..87ad185 100644
--- a/scheme/Makefile.am
+++ b/scheme/Makefile.am
@@ -1,7 +1,9 @@
 
 bin_PROGRAMS=ikarus.boot
-ikarus_boot_SOURCES=ikarus.boot ikarus.apply.ss ikarus.bytevectors.ss ikarus.cafe.ss ikarus.chars.ss ikarus.code-objects.ss ikarus.codecs.ss ikarus.collect.ss ikarus.command-line.ss ikarus.compiler.altcogen.ss ikarus.compiler.ss ikarus.control.ss ikarus.date-string.ss ikarus.fasl.ss ikarus.fasl.write.ss ikarus.fixnums.ss ikarus.guardians.ss ikarus.handlers.ss ikarus.hash-tables.ss ikarus.intel-assembler.ss ikarus.io-ports.ss ikarus.io-primitives.ss ikarus.io-primitives.unsafe.ss ikarus.io.input-files.ss ikarus.io.input-strings.ss ikarus.io.output-files.ss ikarus.io.output-strings.ss ikarus.lists.ss ikarus.load.ss ikarus.main.ss ikarus.multiple-values.ss ikarus.numerics.ss ikarus.pairs.ss ikarus.posix.ss ikarus.predicates.ss ikarus.pretty-print.ss ikarus.promises.ss ikarus.reader.ss ikarus.records.procedural.ss ikarus.singular-objects.ss ikarus.sort.ss ikarus.strings.ss ikarus.structs.ss ikarus.symbols.ss ikarus.timer.ss ikarus.trace.ss ikarus.transcoders.ss ikarus.unicode-data.ss ikarus.vectors.ss ikarus.writer.ss makefile.ss pass-specify-rep-primops.ss pass-specify-rep.ss psyntax.builders.ss psyntax.compat.ss psyntax.config.ss psyntax.expander.ss psyntax.internal.ss psyntax.library-manager.ss r6rs-records.ss ikarus/code-objects.ss ikarus/compiler.ss ikarus/intel-assembler.ss ikarus/fasl/write.ss unicode/unicode-char-cases.ss unicode/unicode-charinfo.ss
+ikarus_boot_SOURCES=ikarus.boot.orig ikarus.apply.ss ikarus.bytevectors.ss ikarus.cafe.ss ikarus.chars.ss ikarus.code-objects.ss ikarus.codecs.ss ikarus.collect.ss ikarus.command-line.ss ikarus.compiler.altcogen.ss ikarus.compiler.ss ikarus.control.ss ikarus.date-string.ss ikarus.fasl.ss ikarus.fasl.write.ss ikarus.fixnums.ss ikarus.guardians.ss ikarus.handlers.ss ikarus.hash-tables.ss ikarus.intel-assembler.ss ikarus.io-ports.ss ikarus.io-primitives.ss ikarus.io-primitives.unsafe.ss ikarus.io.input-files.ss ikarus.io.input-strings.ss ikarus.io.output-files.ss ikarus.io.output-strings.ss ikarus.lists.ss ikarus.load.ss ikarus.main.ss ikarus.multiple-values.ss ikarus.numerics.ss ikarus.pairs.ss ikarus.posix.ss ikarus.predicates.ss ikarus.pretty-print.ss ikarus.promises.ss ikarus.reader.ss ikarus.records.procedural.ss ikarus.singular-objects.ss ikarus.sort.ss ikarus.strings.ss ikarus.structs.ss ikarus.symbols.ss ikarus.timer.ss ikarus.trace.ss ikarus.transcoders.ss ikarus.unicode-data.ss ikarus.vectors.ss ikarus.writer.ss makefile.ss pass-specify-rep-primops.ss pass-specify-rep.ss psyntax.builders.ss psyntax.compat.ss psyntax.config.ss psyntax.expander.ss psyntax.internal.ss psyntax.library-manager.ss r6rs-records.ss ikarus/code-objects.ss ikarus/compiler.ss ikarus/intel-assembler.ss ikarus/fasl/write.ss unicode/unicode-char-cases.ss unicode/unicode-charinfo.ss
 
 ikarus.boot$(EXEEXT): $(ikarus_boot_OBJECTS) $(ikarus_boot_DEPENDENCIES) 
-	echo "nothing to do"
+	../src/ikarus -b ./ikarus.boot.orig --r6rs-script makefile.ss
 
+clean distclean:
+	echo "nothing to clean here"
diff --git a/scheme/ikarus.boot b/scheme/ikarus.boot.orig
similarity index 100%
rename from scheme/ikarus.boot
rename to scheme/ikarus.boot.orig