diff --git a/WORKSPACE b/WORKSPACE
index 0d5ac39eb2..a15e9d5115 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -367,9 +367,9 @@ cc_library(
     ],
 )
 """,
-    sha256 = "92cbe1d023593c2d45588caf2b1530795f376045e8bc3d2868ba349fb8d61ea5",
-    strip_prefix = "IR2Vec-1.1.0",
-    urls = ["https://github.com/IITH-Compilers/IR2Vec/archive/refs/tags/v1.1.0.tar.gz"],
+    sha256 = "92cbe1d0235a3c2d45588caf2b1530795f376045e8bc3d2868ba349fb8d61ea5",
+    strip_prefix = "IR2Vec-828e50584b9c8bc305208e22d2cca272bdb1ab64",
+    urls = ["https://github.com/ChrisCummins/IR2Vec/archive/828e50584b9c8bc305208e22d2cca272bdb1ab64.tar.gz"],
 )
 
 # === Eigen ===
diff --git a/compiler_gym/envs/llvm/service/CMakeLists.txt b/compiler_gym/envs/llvm/service/CMakeLists.txt
index 49be1295e5..459afc9bf1 100644
--- a/compiler_gym/envs/llvm/service/CMakeLists.txt
+++ b/compiler_gym/envs/llvm/service/CMakeLists.txt
@@ -238,6 +238,7 @@ cg_cc_library(
       CpuInfo::cpuinfo
       Boost::filesystem
       glog::glog
+      ir2vec::ir2vec
       ${_LLVM_LIBS}
       magic_enum
       nlohmann_json::nlohmann_json
diff --git a/external/external.cmake b/external/external.cmake
index a3e280b8fc..c4219b8f11 100644
--- a/external/external.cmake
+++ b/external/external.cmake
@@ -135,6 +135,25 @@ else()
     find_package(glog REQUIRED)
 endif()
 
+# === IR2Vec ===
+# https://github.com/IITH-Compilers/IR2Vec
+
+set(COMPILER_GYM_IR2VEC_PROVIDER "internal"
+    CACHE STRING "Find or build IR2Vec together with Compiler Gym."
+)
+set_property(
+    CACHE COMPILER_GYM_IR2VEC_PROVIDER
+    PROPERTY STRINGS "internal" "external"
+)
+if(COMPILER_GYM_IR2VEC_PROVIDER STREQUAL "internal")
+    build_external_cmake_project(
+      NAME ir2vec
+      SRC_DIR     "${CMAKE_CURRENT_LIST_DIR}/ir2vec"
+    )
+else()
+    find_package(ir2vec REQUIRED)
+endif()
+
 # === LLVM ===
 
 set(COMPILER_GYM_LLVM_PROVIDER "internal"
diff --git a/external/ir2vec/CMakeLists.txt b/external/ir2vec/CMakeLists.txt
new file mode 100644
index 0000000000..f415879c5e
--- /dev/null
+++ b/external/ir2vec/CMakeLists.txt
@@ -0,0 +1,23 @@
+# 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.
+
+project(ir2vec)
+cmake_minimum_required(VERSION 3.15)
+
+include(ExternalProject)
+
+externalproject_add(
+    ir2vec
+    PREFIX "${CMAKE_CURRENT_BINARY_DIR}/ir2vec"
+    GIT_REPOSITORY "https://github.com/ChrisCummins/IR2Vec.git"
+    GIT_TAG 828e50584b9c8bc305208e22d2cca272bdb1ab64
+    CMAKE_ARGS
+        -C "${CMAKE_CURRENT_BINARY_DIR}/ir2vec_initial_cache.cmake"
+        "-DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}"
+        "-DLT_LLVM_INSTALL_DIR=${CMAKE_INSTALL_PREFIX}"
+    USES_TERMINAL_CONFIGURE TRUE
+    USES_TERMINAL_BUILD TRUE
+    USES_TERMINAL_INSTALL TRUE
+)