--- a/auto/lib/libxslt/conf
+++ b/auto/lib/libxslt/conf
@@ -12,7 +12,7 @@
                       #include <libxslt/xsltInternals.h>
                       #include <libxslt/transform.h>
                       #include <libxslt/xsltutils.h>"
-    ngx_feature_path="/usr/include/libxml2"
+    ngx_feature_path="${LIBXML2_INC:-/usr/include/libxml2}"
     ngx_feature_libs="-lxml2 -lxslt"
     ngx_feature_test="xmlParserCtxtPtr    ctxt = NULL;
                       xsltStylesheetPtr   sheet = NULL;
@@ -102,7 +102,7 @@ if [ $USE_LIBEXSLT = YES ]; then
     ngx_feature_name=NGX_HAVE_EXSLT
     ngx_feature_run=no
     ngx_feature_incs="#include <libexslt/exslt.h>"
-    ngx_feature_path="/usr/include/libxml2"
+    ngx_feature_path="${LIBXML2_INC:-/usr/include/libxml2}"
     ngx_feature_libs="-lexslt"
     ngx_feature_test="exsltRegisterAll();"
     . auto/feature
