diff --git a/src/plugins/e-acsl/.gitlab-ci.yml b/src/plugins/e-acsl/.gitlab-ci.yml
index 30c46b8eacaacb1cbd8a4b411ba4c40bb100c189..cc5f22f76e3c5ca2f5c393f0aa643f349ca2246f 100644
--- a/src/plugins/e-acsl/.gitlab-ci.yml
+++ b/src/plugins/e-acsl/.gitlab-ci.yml
@@ -1,20 +1,55 @@
+stages:
+ - build
+ - tests
+
+E-ACSL:
+  stage: build
+  variables:
+    CURRENT: $CI_COMMIT_REF_NAME
+    DEFAULT: "test-nix"
+    OCAML: "4_05"
+    FRAMA_CI_OPT: "--override e-acsl:$CI_COMMIT_REF_NAME,$CI_COMMIT_SHA"
+  script:
+   - nix/frama-ci.sh build -A e-acsl.installed
+  tags:
+   - nix
+  retry: 2
+
 Tests:
+  stage: tests
+  variables:
+    CURRENT: $CI_COMMIT_REF_NAME
+    DEFAULT: "test-nix"
+    OCAML: "4_05"
+    FRAMA_CI_OPT: "--override e-acsl:$CI_COMMIT_REF_NAME,$CI_COMMIT_SHA"
   script:
-  - ~oci/oci/bin/bf_client.native run --socket ~oci/data/oci-data/oci.socket --E-ACSL $CI_BUILD_REF --branch $CI_BUILD_REF_NAME E-ACSL --cppo 07d2bcee50670aecae7e094d92f68fd18314073a --ocamlgraph 9286b375c005d1d504a1def0c5986f54c7f12251 --url ocamlfind,git@git.frama-c.com:bobot/ocamlfind.git
+   - nix/frama-ci.sh build -A e-acsl.tests
   tags:
-  except:
-  - tags
+   - nix
+  retry: 2
 
-context-from-precondition:
+Cfp:
+  stage: tests
+  variables:
+    CURRENT: $CI_COMMIT_REF_NAME
+    DEFAULT: "test-nix"
+    OCAML: "4_05"
+    FRAMA_CI_OPT: "--override e-acsl:$CI_COMMIT_REF_NAME,$CI_COMMIT_SHA"
   script:
-  - ~oci/oci/bin/bf_client.native run --socket ~oci/data/oci-data/oci.socket --E-ACSL $CI_BUILD_REF --branch $CI_BUILD_REF_NAME context-from-precondition --cppo 07d2bcee50670aecae7e094d92f68fd18314073a --ocamlgraph 9286b375c005d1d504a1def0c5986f54c7f12251 --url ocamlfind,git@git.frama-c.com:bobot/ocamlfind.git
+   - nix/frama-ci.sh build -A context-from-precondition.tests
   tags:
-  except:
-  - tags
+   - nix
+  retry: 2
 
 Security:
+  stage: tests
+  variables:
+    CURRENT: $CI_COMMIT_REF_NAME
+    DEFAULT: "test-nix"
+    OCAML: "4_05"
+    FRAMA_CI_OPT: "--override e-acsl:$CI_COMMIT_REF_NAME,$CI_COMMIT_SHA"
   script:
-  - ~oci/oci/bin/bf_client.native run --socket ~oci/data/oci-data/oci.socket --E-ACSL $CI_BUILD_REF --branch $CI_BUILD_REF_NAME Security --cppo 07d2bcee50670aecae7e094d92f68fd18314073a --ocamlgraph 9286b375c005d1d504a1def0c5986f54c7f12251 --url ocamlfind,git@git.frama-c.com:bobot/ocamlfind.git
+   - nix/frama-ci.sh build -A security.tests
   tags:
-  except:
-  - tags
+   - nix
+  retry: 2
diff --git a/src/plugins/e-acsl/Makefile.in b/src/plugins/e-acsl/Makefile.in
index 8b58780133736fc4bd884e31b5455971d05d7d04..e5f2b74f3c0fd24db54a81ae9b0c958386f1a9ef 100644
--- a/src/plugins/e-acsl/Makefile.in
+++ b/src/plugins/e-acsl/Makefile.in
@@ -133,6 +133,16 @@ $(EACSL_PLUGIN_DIR)/local_config.ml: $(EACSL_PLUGIN_DIR)/Makefile.in $(VERSION_F
 
 ifeq (@MAY_RUN_TESTS@,yes)
 
+-include in_frama_ci
+
+ifeq ($(IN_FRAMA_CI),yes)
+
+PLUGIN_TESTS_DIRS := \
+	gmp \
+	no-main
+
+else
+
 PLUGIN_TESTS_DIRS := \
 	format \
 	reject \
@@ -141,11 +151,10 @@ PLUGIN_TESTS_DIRS := \
 	gmp \
 	no-main \
 	full-mmodel \
-	temporal
+	temporal \
+	builtin
 
-# the following test suite is deactivated for the time being:
-# uncompatible with OCI
-#	builtin
+endif
 
 PLUGIN_TESTS_LIB := $(EACSL_PLUGIN_DIR)/tests/print.ml
 E_ACSL_TESTS: $(EACSL_PLUGIN_DIR)/tests/test_config
diff --git a/src/plugins/e-acsl/nix/default.nix b/src/plugins/e-acsl/nix/default.nix
new file mode 100644
index 0000000000000000000000000000000000000000..6c41960f846c6e6ed7cc5b386ba6ae683cb0189c
--- /dev/null
+++ b/src/plugins/e-acsl/nix/default.nix
@@ -0,0 +1,11 @@
+# paramaterised derivation with dependencies injected (callPackage style)
+{ pkgs, stdenv, src ? ../., opam2nix, ocaml_version ? "ocamlPackages_latest.ocaml", plugins ? { } }:
+
+plugins.helpers.simple_plugin
+  { inherit pkgs stdenv src opam2nix ocaml_version plugins;
+    deps = [ pkgs.getopt pkgs.which ];
+    name = "e-acsl";
+    preBuild = ''
+          echo IN_FRAMA_CI=yes > in_frama_ci
+    '';
+  }
diff --git a/src/plugins/e-acsl/nix/frama-ci.nix b/src/plugins/e-acsl/nix/frama-ci.nix
new file mode 100644
index 0000000000000000000000000000000000000000..d90edd7caf5d5d946acf2df948b2f359f2cfbf00
--- /dev/null
+++ b/src/plugins/e-acsl/nix/frama-ci.nix
@@ -0,0 +1,15 @@
+#To copy in other repository
+{ pkgs ? import <nixpkgs> {}, password}:
+
+let
+    src = builtins.fetchGit {
+            "url" = "https://bobot:${password}@git.frama-c.com/frama-c/Frama-CI.git";
+            "name" = "Frama-CI";
+            "rev" = "d8d527e3716e3190aa89b48ee417a0618c0f3408";
+            "ref" = "master";
+    };
+ in
+ {
+  src = src;
+  compiled = pkgs.callPackage "${src}/compile.nix" { inherit pkgs; };
+ }
diff --git a/src/plugins/e-acsl/nix/frama-ci.sh b/src/plugins/e-acsl/nix/frama-ci.sh
new file mode 100755
index 0000000000000000000000000000000000000000..b4a69f90154968218273a70d50be6173a2909841
--- /dev/null
+++ b/src/plugins/e-acsl/nix/frama-ci.sh
@@ -0,0 +1,12 @@
+#!/bin/sh -eu
+
+DIR=$(dirname $0)
+
+export FRAMA_CI_NIX=$DIR/frama-ci.nix
+
+export FRAMA_CI=$(nix-instantiate --eval -E "((import <nixpkgs> {}).callPackage $FRAMA_CI_NIX  { password = \"$TOKEN_FOR_API\";}).src.outPath")
+
+FRAMA_CI=${FRAMA_CI#\"}
+FRAMA_CI=${FRAMA_CI%\"}
+
+$FRAMA_CI/compile.sh $@