From 2175e39f5a45cb7bbccc790779fac1f76c05b28c Mon Sep 17 00:00:00 2001
From: Ralf Jung <jung@mpi-sws.org>
Date: Thu, 28 Sep 2017 13:32:17 +0200
Subject: [PATCH] fix build-dep on macOS

---
 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index cff640c1..83a26f56 100644
--- a/Makefile
+++ b/Makefile
@@ -19,10 +19,10 @@ Makefile.coq: _CoqProject Makefile awk.Makefile
 	mv Makefile.coq Makefile.coq.tmp && awk -f awk.Makefile Makefile.coq.tmp > Makefile.coq && rm Makefile.coq.tmp
 
 # Install build-dependencies
-build-dep/opam: opam
+build-dep/opam: opam Makefile
 	# Create the build-dep package.
 	@mkdir -p build-dep
-	@sed <opam 's/^\(build\|install\|remove\):.*/\1: []/; s/^name: *"\(.*\)" */name: "\1-builddep"/' > build-dep/opam
+	@sed <opam -E 's/^(build|install|remove):.*/\1: []/; s/^name: *"(.*)" */name: "\1-builddep"/' >build-dep/opam
 	@fgrep builddep build-dep/opam >/dev/null || (echo "sed failed to fix the package name" && exit 1) # sanity check
 
 build-dep: build-dep/opam phony
-- 
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