diff --git a/infer/src/backend/dune b/infer/src/backend/dune
new file mode 100644
index 000000000..b1bc07bfd
--- /dev/null
+++ b/infer/src/backend/dune
@@ -0,0 +1,18 @@
+; Copyright (c) Facebook, Inc. and its affiliates.
+;
+; This source code is licensed under the MIT license found in the
+; LICENSE file in the root directory of this source tree.
+
+(library
+ (name backend)
+ (public_name infer.backend)
+ (flags
+  (:standard
+     -open Core -open InferStdlib -open IStd -open OpenSource -open InferGenerated
+     -open InferBase -open InferIR -open Absint -open Biabduction -open Bo -open Nullsafe
+     -open Pulselib  -open Checkers -open Costlib -open Quandary -open TOPL
+     -open Concurrency -open Labs))
+ (libraries core InferStdlib InferGenerated InferBase InferIR absint biabduction nullsafe bo
+            checkers costlib quandary TOPL concurrency labs)
+ (preprocess (pps ppx_compare ppx_fields_conv))
+)
diff --git a/infer/src/deadcode/Makefile b/infer/src/deadcode/Makefile
index 2bafef399..dd3d79aa5 100644
--- a/infer/src/deadcode/Makefile
+++ b/infer/src/deadcode/Makefile
@@ -50,8 +50,8 @@ endif
 # Note that we run find under _build directory. Since we copy some
 # sources from subfolders to src/ folder to avoid duplicates we use
 # $(DEPTH_ONE) and iteration over main and library folders.
-LIBRARY_FOLDERS = . ./IR ./absint ./atd ./base ./biabduction ./bufferoverrun ./c_stubs ./checkers ./concurrency ./cost ./istd ./labs ./nullsafe ./pulse ./quandary ./scripts ./topl
-INCLUDE_FOLDERS = -I absint -I IR -I atd -I base -I biabduction -I bufferoverrun -I c_stubs -I checkers -I concurrency -I cost -I istd -I labs -I nullsafe -I pulse -I quandary -I scripts -I topl
+LIBRARY_FOLDERS = . ./IR ./absint ./atd ./backend ./base ./biabduction ./bufferoverrun ./c_stubs ./checkers ./concurrency ./cost ./istd ./labs ./nullsafe ./pulse ./quandary ./scripts ./topl
+INCLUDE_FOLDERS = -I absint -I IR -I atd -I backend -I base -I biabduction -I bufferoverrun -I c_stubs -I checkers -I concurrency -I cost -I istd -I labs -I nullsafe -I pulse -I quandary -I scripts -I topl
 
 ml_src_files:=$(shell \
 	cd $(INFER_BUILD_DIR); \
diff --git a/infer/src/dune.in b/infer/src/dune.in
index 005cdccca..2f9abfcb9 100644
--- a/infer/src/dune.in
+++ b/infer/src/dune.in
@@ -12,7 +12,6 @@ let ( ^/ ) = Filename.concat
 let source_dirs =
   (if clang then ["al"; "clang"; "unit" ^/ "clang"] else ["clang_stubs"; "unit" ^/ "clang_stubs"])
   @ [ (if java then "java" else "java_stubs")
-    ; "backend"
     ; "integration"
     ; "test_determinator"
     ; "unit"
@@ -80,7 +79,9 @@ let infer_cflags =
   ; "-open"
   ; "InferBase"
   ; "-open"
-  ; "InferCStubs" ]
+  ; "InferCStubs"
+  ; "-open"
+  ; "Backend" ]
   |> String.concat " "
 
 
@@ -111,7 +112,8 @@ let main_lib_stanza =
          ; "quandary"
          ; "TOPL"
          ; "concurrency"
-         ; "labs" ] ))
+         ; "labs"
+         ; "backend" ] ))
     (String.concat " " infer_binaries)
 
 
diff --git a/infer/src/backend/Differential.ml b/infer/src/integration/Differential.ml
similarity index 100%
rename from infer/src/backend/Differential.ml
rename to infer/src/integration/Differential.ml
diff --git a/infer/src/backend/Differential.mli b/infer/src/integration/Differential.mli
similarity index 100%
rename from infer/src/backend/Differential.mli
rename to infer/src/integration/Differential.mli
diff --git a/infer/src/backend/DifferentialFilters.ml b/infer/src/integration/DifferentialFilters.ml
similarity index 100%
rename from infer/src/backend/DifferentialFilters.ml
rename to infer/src/integration/DifferentialFilters.ml
diff --git a/infer/src/backend/DifferentialFilters.mli b/infer/src/integration/DifferentialFilters.mli
similarity index 100%
rename from infer/src/backend/DifferentialFilters.mli
rename to infer/src/integration/DifferentialFilters.mli