Index: math/singular/Makefile
===================================================================
--- math/singular/Makefile	(revision 474760)
+++ math/singular/Makefile	(working copy)
@@ -14,7 +14,7 @@
 LIB_DEPENDS=	libgmp.so:math/gmp \
 		libmpfr.so:math/mpfr
 
-USES=		gmake libtool perl5 pkgconfig shebangfix
+USES=		gmake libtool ncurses perl5 pkgconfig shebangfix
 USE_PERL5=	build
 USE_LDCONFIG=	yes
 GNU_CONFIGURE=	yes
@@ -23,4 +23,10 @@
 SHEBANG_FILES=	libpolys/libpolys-config.in \
 		libsingular-config.in
 
+# not a shebang but "/bin/bash" is hardcoded in some files
+post-patch:
+	  @${REINPLACE_CMD} -e "s|/bin/bash|${LOCALBASE}/bin/bash|g" \
+		 ${WRKSRC}/emacs/.emacs-general
+
+
 .include <bsd.port.mk>