component/libgit2: python is required

component/libgit2/buildout.cfg

 [buildout]
 extends =
+  ../defaults.cfg
   ../cmake/buildout.cfg
   ../openssl/buildout.cfg
   ../pkgconfig/buildout.cfg
@@ -21,14 +22,12 @@ configure-options =
   -Bbuild
   -DCMAKE_BUILD_TYPE=Release
   -DCMAKE_INSTALL_PREFIX=@@LOCATION@@
-  -DCMAKE_C_FLAGS="${:CMAKE_CFLAGS}"
-  -DCMAKE_INSTALL_RPATH=${:CMAKE_LIBRARY_PATH}
+  -DCMAKE_C_FLAGS="-I${openssl:location}/include -I${zlib:location}/include -I${pcre:location}/include"
+  -DCMAKE_INSTALL_RPATH=${zlib:location}/lib:${openssl:location}/lib:${pcre:location}/lib
   -G"Unix Makefiles"
 
 make-options = -C build
 environment =
   PKG_CONFIG_PATH=${openssl:location}/lib/pkgconfig:${zlib:location}/lib/pkgconfig:${xz-utils:location}/lib/pkgconfig
-  PATH=${pkgconfig:location}/bin:${cmake:location}/bin:%(PATH)s
+  PATH=${python:location}/bin:${pkgconfig:location}/bin:${cmake:location}/bin:%(PATH)s
   LDFLAGS=-L${openssl-1.0:location}/lib -Wl,-rpath=${openssl:location}/lib -L${pcre:location}/lib -Wl,-rpath=${pcre:location}/lib
-CMAKE_CFLAGS = -I${openssl:location}/include -I${zlib:location}/include -I${pcre:location}/include
-CMAKE_LIBRARY_PATH=${zlib:location}/lib:${openssl:location}/lib:${pcre:location}/lib