--- a/Makefile	Tue Jun 01 17:45:24 2021 +0300
+++ b/Makefile	Tue Jun 01 17:47:00 2021 +0300
@@ -40,17 +40,11 @@
 ifneq '' '$(filter CYGWIN%,$(uname-s))'
   host_os = cygwin
 endif
-ifeq 'SunOS' '$(uname-s)'
-  host_os = solaris
-endif
 
 ################################################################
 # Build tool definition/switches.
 
 INSTALL_DATA := install -m 640 -D
-ifeq '$(host_os)' 'solaris'
-  INSTALL_DATA := ginstall -m 640 -D
-endif
 
 RST2HTML = rst2html
 ifeq '$(host_os)' 'cygwin'