--- lzip-1.24.orig/configure	2024-01-26 14:01:44.000000000 +0100
+++ lzip-1.24/configure	2024-02-12 07:10:37.674941547 +0100
@@ -23,10 +23,10 @@ mandir='$(datarootdir)/man'
 build=no
 check=no
 installdir=
-CXX=g++
-CPPFLAGS=
-CXXFLAGS='-Wall -W -O2'
-LDFLAGS=
+CXX?=g++
+CPPFLAGS?=
+CXXFLAGS?='-Wall -W -O2'
+LDFLAGS?=
 MAKEINFO=makeinfo
 
 # checking whether we are using GNU C++.