diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 07700cc1ac3db3866db5912a5be9cd59bb51706e..5b7443dd14ba7baefafe98da0206a0666078b2f7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -29,22 +29,17 @@ variables:
 build-coq.8.7.2:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.7.2   coq-mathcomp-ssreflect version 1.6.4"
+    OPAM_PINS: "coq version 8.7.2"
     OPAM_PKG: "coq-lambda-rust"
     TIMING_PROJECT: "lambda-rust"
     TIMING_CONF: "coq-8.7.2"
   tags:
   - fp-timing
 
-build-coq.8.6.1:
-  <<: *template
-  variables:
-    OPAM_PINS: "coq version 8.6.1   coq-mathcomp-ssreflect version 1.6.4"
-
 build-iris.dev:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.7.2   coq-mathcomp-ssreflect version 1.6.4   coq-iris.dev git https://gitlab.mpi-sws.org/FP/iris-coq.git#$IRIS_REV"
+    OPAM_PINS: "coq version 8.7.2   coq-iris.dev git https://gitlab.mpi-sws.org/FP/iris-coq.git#$IRIS_REV"
   except:
   only:
   - triggers
diff --git a/README.md b/README.md
index 8df134e8fcbe45a46bfb705e7ebd4d59ea2904a2..7de8d982fbbf83681363b6cfc48ce2f8502a3618 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,7 @@ This is the Coq development accompanying lambda-Rust.
 
 This version is known to compile with:
 
- - Coq 8.6.1 / 8.7.2
- - Ssreflect 1.6.4
+ - Coq 8.7.2
  - A development version of [Iris](https://gitlab.mpi-sws.org/FP/iris-coq/)
 
 ## Building from source