upgrade to opam 2 package

Makefile

@@ -29,14 +29,8 @@ build-dep: build-dep/opam phony
 	@# that are incompatible with our build requirements.
 	@# To achieve this, we create a fake opam package that has our build-dependencies as
 	@# dependencies, but does not actually install anything itself.
-	@echo "# Pinning build-dep package." && \
-	  if opam --version | grep "^1\." -q; then \
-	    BUILD_DEP_PACKAGE="$$(egrep "^name:" build-dep/opam | sed 's/^name: *"\(.*\)" */\1/')" && \
-	    opam pin add -k path $(OPAMFLAGS) "$$BUILD_DEP_PACKAGE".dev build-dep && \
-	    opam reinstall $(OPAMFLAGS) "$$BUILD_DEP_PACKAGE"; \
-	  else \
-	    opam install $(OPAMFLAGS) build-dep/; \
-	  fi
+	@echo "# Installing build-dep package."
+	@opam install $(OPAMFLAGS) build-dep/
 
 # Some files that do *not* need to be forwarded to Makefile.coq
 Makefile: ;

descr

-A formal model of a Rust core langauge and type system, a logical relation for
-the type system, and safety proof for some Rust libraries.

opam

-opam-version: "1.2"
+opam-version: "2.0"
 name: "coq-lambda-rust"
-version: "dev"
 maintainer: "Ralf Jung <jung@mpi-sws.org>"
 authors: "The RustBelt Team"
 license: "BSD"
-homepage: "http://plv.mpi-sws.org/rustbelt/"
+homepage: "https://plv.mpi-sws.org/rustbelt/"
 bug-reports: "https://gitlab.mpi-sws.org/iris/lambda-rust/issues"
-dev-repo: "https://gitlab.mpi-sws.org/iris/lambda-rust.git"
-build: [make "-j%{jobs}%"]
-install: [make "install"]
-remove: [ "sh" "-c" "rm -rf '%{lib}%/coq/user-contrib/lrust'" ]
+dev-repo: "git+https://gitlab.mpi-sws.org/iris/lambda-rust.git"
+
+synopsis: "LambdaRust Coq formalization"
+description: """
+A formal model of a Rust core langauge and type system, a logical relation for
+the type system, and safety proof for some Rust libraries.
+"""
+
 depends: [
   "coq-iris" { (= "dev.2019-12-13.0.335ff6d7") | (= "dev") }
 ]
+
+build: [make "-j%{jobs}%"]
+install: [make "install"]