diff --git a/.gitignore b/.gitignore
index d3d0e2c..caeafa5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 *~
+*.o
 /passt
 /passt.avx2
 /pasta
diff --git a/Makefile b/Makefile
index a5256f5..4c99771 100644
--- a/Makefile
+++ b/Makefile
@@ -100,29 +100,41 @@ else
 BIN := passt pasta qrap
 endif
 
-all: $(BIN) $(MANPAGES) docs
+.NOTPARALLEL: seccomp.h
+all: seccomp.h $(BIN) $(MANPAGES) docs
+
+PASST_OBJS = $(PASST_SRCS:.c=.o)
+PASST_AVX2_OBJS = $(PASST_SRCS:.c=.avx2.o)
+OBJS = $(SRCS:.c=.o)
+QRAP_OBJS = $(QRAP_SRCS:.c=.o)
+AVXFLAGS += -Ofast -mavx2 -ftree-vectorize -funroll-loops
 
 static: FLAGS += -static -DGLIBC_NO_STATIC_NSS
-static: clean all
+static: clean seccomp.h all
 
 seccomp.h: seccomp.sh $(PASST_SRCS) $(PASST_HEADERS)
 	@ EXTRA_SYSCALLS="$(EXTRA_SYSCALLS)" ARCH="$(TARGET_ARCH)" CC="$(CC)" ./seccomp.sh $(PASST_SRCS) $(PASST_HEADERS)
 
-passt: $(PASST_SRCS) $(HEADERS)
-	$(CC) $(FLAGS) $(CFLAGS) $(CPPFLAGS) $(PASST_SRCS) -o passt $(LDFLAGS)
+.c.o:
+	$(CC) $(FLAGS) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
 
-passt.avx2: FLAGS += -Ofast -mavx2 -ftree-vectorize -funroll-loops
-passt.avx2: $(PASST_SRCS) $(HEADERS)
-	$(CC) $(filter-out -O2,$(FLAGS)) $(CFLAGS) $(CPPFLAGS) \
-		$(PASST_SRCS) -o passt.avx2 $(LDFLAGS)
+$(PASST_AVX2_OBJS): seccomp.h
+	$(CC) $(AVXFLAGS) $(FLAGS) $(CFLAGS) $(CPPFLAGS) -c $(@:.avx2.o=.c) -o $@
 
-passt.avx2: passt
+passt: $(PASST_OBJS) seccomp.h
+	$(CC) $(FLAGS) $(CFLAGS) $(CPPFLAGS) $(PASST_OBJS) -o passt $(LDFLAGS)
+
+passt.avx2: $(PASST_AVX2_OBJS) $(HEADERS) seccomp.h
+	$(CC) $(filter-out -O2,$(FLAGS)) $(CFLAGS) $(CPPFLAGS) $(AVXFLAGS) \
+		$(PASST_AVX2_OBJS) -o passt.avx2 $(LDFLAGS)
+
+passt.avx2: passt seccomp.h
 
 pasta.avx2 pasta.1 pasta: pasta%: passt%
 	ln -sf $< $@
 
-qrap: $(QRAP_SRCS) passt.h
-	$(CC) $(FLAGS) $(CFLAGS) $(CPPFLAGS) $(QRAP_SRCS) -o qrap $(LDFLAGS)
+qrap: $(QRAP_OBJS) passt.h seccomp.h
+	$(CC) $(FLAGS) $(CFLAGS) $(CPPFLAGS) $(QRAP_OBJS) -o qrap $(LDFLAGS)
 
 valgrind: EXTRA_SYSCALLS += rt_sigprocmask rt_sigtimedwait rt_sigaction	\
 			    getpid gettid kill clock_gettime mmap	\
@@ -170,21 +182,8 @@ pkgs: static
 # other way around: the web version should be obtained by adding HTML and
 # JavaScript portions to a plain Markdown, instead. However, cgit needs to use
 # a file in the git tree. Find a better way around this.
-docs: README.md
-	@(								\
-		skip=0;							\
-		while read l; do					\
-			case $$l in					\
-			"## Demo")	exit 0		;;		\
-			"<!"*)				;;		\
-			"</"*)		skip=1		;;		\
-			"<"*)		skip=2		;;		\
-			esac;						\
-									\
-			[ $$skip -eq 0 ]	&& echo "$$l";		\
-			[ $$skip -eq 1 ]	&& skip=0;		\
-		done < README.md;					\
-	) > README.plain.md
+docs:
+	[ ! -e doc/ ]; mkdir docs; perl makedocs.pl > docs/README.plain.md
 
 # Checkers currently disabled for clang-tidy:
 # - llvmlibc-restrict-system-libc-headers
diff --git a/makedocs.pl b/makedocs.pl
new file mode 100644
index 0000000..295e1d9
--- /dev/null
+++ b/makedocs.pl
@@ -0,0 +1,19 @@
+use strict;
+
+my $str = '';
+my $regex = qr/(<[^\/].*?>.*?<\/.*?>\n?)|(<\/div>)|(<\/p>)/msp;
+my $subst = '';
+
+
+local $/=undef;
+open FILE, '<', 'README.md' or die "Can't open file $!";
+my $file_content = <FILE>;
+close FILE;
+#print "Source: $file_content\n";
+my $result = $file_content =~ s/$regex//rg;
+
+my $regex2 = qr/\n[ \n]{3,}\n/msp;
+$result = $result =~ s/$regex2/\n\n/rg;
+
+#print "The result of the substitution is: $result\n";
+print "$result\n";