diff --git a/chicken.spec b/chicken.spec
index 6d03398..3de33af 100644
--- a/chicken.spec
+++ b/chicken.spec
@@ -1,18 +1,18 @@
 Name: chicken
 Version: 4.1.0
-Release: alt2.1
+Release: alt2.2
+
+Summary: CHICKEN is a simple Scheme-to-C compiler
 License: BSD style (see LICENSE)
 Group: Development/Scheme
+
 Url: http://www.call-with-current-continuation.org/
 Source: %name-%version.tar
-Requires: libchicken-devel = %version-%release
-Summary: CHICKEN is a simple Scheme-to-C compiler
 Packager: Alexey Voinov <voins@altlinux.ru>
 
+Requires: libchicken-devel = %version-%release
 BuildPreReq: chrpath
 
-# Automatically added by buildreq on Sat Nov 01 2003
-
 %description
 CHICKEN is a simple Scheme-to-C compiler supporting the language features as
 defined in the 'Revised^5 Report on Scheme'. CHICKEN generates quite
@@ -61,18 +61,20 @@ BuildArch: noarch
 Manual for Chicken scheme-to-c compiler
 
 %prep
-%setup -q
+%setup
 
 %build
 %remove_optflags -Wall
-make PLATFORM=linux PREFIX=%_prefix LIBDIR=%_libdir \
-    C_COMPILER_OPTIMIZATION_OPTIONS="$RPM_OPT_FLAGS"
-
+# slightly broken parallel build
+%make_build PLATFORM=linux PREFIX=%_prefix LIBDIR=%_libdir \
+    C_COMPILER_OPTIMIZATION_OPTIONS="%optflags" ||
+%make PLATFORM=linux PREFIX=%_prefix LIBDIR=%_libdir \
+    C_COMPILER_OPTIMIZATION_OPTIONS="%optflags"
 
 %install
-make PLATFORM=linux PREFIX=%_prefix LIBDIR=%_libdir \
-    DESTDIR=$RPM_BUILD_ROOT install
-rm -rf $RPM_BUILD_ROOT%_datadir/%name/doc
+%make PLATFORM=linux PREFIX=%_prefix LIBDIR=%_libdir \
+    DESTDIR=%buildroot install
+rm -rf %buildroot%_datadir/%name/doc
 
 for i in %buildroot%_bindir/* %buildroot%_libdir/%name/4/*.so
 do
@@ -101,6 +103,10 @@ done
 %_libdir/lib*.a
 
 %changelog
+* Thu Apr 04 2019 Michael Shigorin <mike@altlinux.org> 4.1.0-alt2.2
+- parallelize build
+- minor spec cleanup
+
 * Thu Feb 02 2012 Eugeny A. Rostovtsev (REAL) <real at altlinux.org> 4.1.0-alt2.1
 - Removed bad RPATH
 
@@ -116,7 +122,6 @@ done
 - new version (2.5)
 - alt-makefile patch removed (obsolete)
 
-
 * Sun Oct 02 2005 Alexey Voinov <voins@altlinux.ru> 2.2-alt1
 - new version (2.2)