diff --git a/scheme/Makefile.am b/scheme/Makefile.am
index 1a88629..1135e6c 100644
--- a/scheme/Makefile.am
+++ b/scheme/Makefile.am
@@ -1,6 +1,6 @@
 
 nodist_pkglib_DATA=ikarus.boot
-EXTRA_DIST=ikarus.boot.orig ikarus.enumerations.ss ikarus.exceptions.ss 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.conditions.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
+EXTRA_DIST=ikarus.boot.prebuilt ikarus.enumerations.ss ikarus.exceptions.ss 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.conditions.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
 
 all: $(nodist_pkglib_DATA)
 
@@ -17,5 +17,5 @@ CLEANFILES=$(nodist_pkglib_DATA) ikarus.config.ss
 MAINTAINERCLEANFILES=last-revision
 
 ikarus.boot: $(EXTRA_DIST) ikarus.config.ss
-	../src/ikarus -b ./ikarus.boot.orig --r6rs-script makefile.ss
+	../src/ikarus -b ./ikarus.boot.prebuilt --r6rs-script makefile.ss
 
diff --git a/scheme/Makefile.in b/scheme/Makefile.in
index 6559a06..7027aff 100644
--- a/scheme/Makefile.in
+++ b/scheme/Makefile.in
@@ -155,7 +155,7 @@ target_vendor = @target_vendor@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 nodist_pkglib_DATA = ikarus.boot
-EXTRA_DIST = ikarus.boot.orig ikarus.enumerations.ss \
+EXTRA_DIST = ikarus.boot.prebuilt ikarus.enumerations.ss \
 	ikarus.exceptions.ss 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 \
@@ -380,7 +380,7 @@ ikarus.config.ss: Makefile last-revision
 	echo '(define ikarus-lib-dir "$(pkglibdir)")' >>$@
 
 ikarus.boot: $(EXTRA_DIST) ikarus.config.ss
-	../src/ikarus -b ./ikarus.boot.orig --r6rs-script makefile.ss
+	../src/ikarus -b ./ikarus.boot.prebuilt --r6rs-script makefile.ss
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT:
diff --git a/scheme/ikarus.boot.orig b/scheme/ikarus.boot.prebuilt
similarity index 100%
rename from scheme/ikarus.boot.orig
rename to scheme/ikarus.boot.prebuilt
diff --git a/scheme/last-revision b/scheme/last-revision
index e601c44..61280f5 100644
--- a/scheme/last-revision
+++ b/scheme/last-revision
@@ -1 +1 @@
-1135
+1136