Index: head/cad/qcad/Makefile
===================================================================
--- head/cad/qcad/Makefile
+++ head/cad/qcad/Makefile
@@ -20,8 +20,6 @@
 BUILD_DEPENDS=	bash:shells/bash	\
 		${LOCALBASE}/lib/libopenNURBS.a:graphics/opennurbs
 
-MAKE_JOBS_UNSAFE=yes
-
 USES=		compiler:c++11-lang gl gmake qmake qt:5
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
@@ -55,6 +53,18 @@
 CFLAGS_i386= -fPIC
 CXXFLAGS_i386= -fPIC
 LDFLAGS_i386= -Wl,-z,notext
+
+.include <bsd.port.options.mk>
+
+.if defined(WITH_DEBUG)
+ALL_TARGET=     debug
+PLIST_SUB+=     DEBUG_LIB_SUFFIX="_debug"
+RESDIR=         ${WRKSRC}/debug
+.else
+ALL_TARGET=     release
+PLIST_SUB+=     DEBUG_LIB_SUFFIX=""
+RESDIR=         ${WRKSRC}/release
+.endif
 
 pre-configure:
 	${MKDIR} ${WRKSRC}/src/3rdparty/qt-labs-qtscriptgenerator-${_QT_VERSION}
Index: head/cad/qcad/pkg-plist
===================================================================
--- head/cad/qcad/pkg-plist
+++ head/cad/qcad/pkg-plist
@@ -578,8 +578,7 @@
 %%DATADIR%%/patterns/metric/xmastree-02.pat
 %%DATADIR%%/patterns/metric/zigzag.pat
 %%DATADIR%%/plugins/codecs/readme.txt
-%%DATADIR%%/plugins/designer/libqcadcustomwidgets.so
-%%DATADIR%%/plugins/designer/libqcadcustomwidgets_debug.so
+%%DATADIR%%/plugins/designer/libqcadcustomwidgets%%DEBUG_LIB_SUFFIX%%.so
 %%DATADIR%%/plugins/designer/readme.txt
 %%DATADIR%%/plugins/imageformats/libqgif.so
 %%DATADIR%%/plugins/imageformats/libqico.so
@@ -588,10 +587,8 @@
 %%DATADIR%%/plugins/imageformats/libqtga.so
 %%DATADIR%%/plugins/imageformats/libqtiff.so
 %%DATADIR%%/plugins/imageformats/readme.txt
-%%DATADIR%%/plugins/libqcaddxf.so
-%%DATADIR%%/plugins/libqcaddxf_debug.so
-%%DATADIR%%/plugins/libqcadscripts.so
-%%DATADIR%%/plugins/libqcadscripts_debug.so
+%%DATADIR%%/plugins/libqcaddxf%%DEBUG_LIB_SUFFIX%%.so
+%%DATADIR%%/plugins/libqcadscripts%%DEBUG_LIB_SUFFIX%%.so
 %%DATADIR%%/plugins/printsupport/libcupsprintersupport.so
 %%DATADIR%%/plugins/printsupport/readme.txt
 %%DATADIR%%/plugins/script/libqtscript_core.so