prepare for nightly builds

.gitlab-ci.yml

@@ -33,3 +33,12 @@ build-coq.8.9.0:
     TIMING_CONF: "coq-8.9.0"
   tags:
   - fp-timing
+
+build-iris.dev:
+  <<: *template
+  variables:
+    OPAM_PINS: "coq version 8.9.0   coq-stdpp.dev git git+https://gitlab.mpi-sws.org/iris/stdpp.git#$STDPP_REV  coq-iris.dev git git+https://gitlab.mpi-sws.org/iris/iris.git#$IRIS_REV"
+  except:
+  only:
+  - triggers
+  - schedules