diff --git a/science/dlib-cpp/Makefile b/science/dlib-cpp/Makefile
index a9f7293aab3c..98c6d4828563 100644
--- a/science/dlib-cpp/Makefile
+++ b/science/dlib-cpp/Makefile
@@ -1,38 +1,39 @@
 PORTNAME=	dlib
 DISTVERSIONPREFIX=v
 DISTVERSION=	20.0
 PORTREVISION=	1
 CATEGORIES=	science devel math
 PKGNAMESUFFIX=	-cpp
 
 MAINTAINER=	arrowd@FreeBSD.org
 COMMENT=	Machine learning framework written in C++
 WWW=		http://dlib.net
 
 LICENSE=	BSL
 LICENSE_FILE=	${WRKSRC}/dlib/LICENSE.txt
 
 LIB_DEPENDS=	libpng.so:graphics/png \
 		libgif.so:graphics/giflib
 
 USES=			cmake compiler:c++11-lang jpeg pkgconfig sqlite tar:bzip2 xorg
 USE_LDCONFIG=		yes
 USE_XORG=		ice sm x11 xext
 
 USE_GITHUB=		yes
 GH_ACCOUNT=		davisking
 
-EXTRACT_AFTER_ARGS=	--exclude=${PORTNAME}-${DISTVERSION}/dlib/external
+EXTRACT_AFTER_ARGS=	--exclude=${PORTNAME}-${DISTVERSION}/dlib/external \
+			--no-same-owner --no-same-permissions
 
 CMAKE_ON=		BUILD_SHARED_LIBS
 
 OPTIONS_DEFINE=		BLASLAPACK FFMPEG
 
 BLASLAPACK_DESC=	Use OpenBLAS for matrix operations
 FFMPEG_DESC=		Build with the FFMPEG wrappers
 
 BLASLAPACK_USES=	blaslapack:openblas
 BLASLAPACK_CMAKE_OFF=	-DDLIB_USE_BLAS=0 -DDLIB_USE_LAPACK=0
 FFMPEG_LIB_DEPENDS=	libavcodec.so:multimedia/ffmpeg
 
 .include <bsd.port.mk>