diff --git a/gnu/local.mk b/gnu/local.mk
index 99e9b5a6ab..6f62493ff2 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -964,6 +964,7 @@ dist_patch_DATA =
    \
   %D%/packages/patches/findutils-localstatedir.patch           \
   %D%/packages/patches/findutils-test-rwlock-threads.patch     \
   %D%/packages/patches/flann-cmake-3.11.patch                  \
+  %D%/packages/patches/folly-add-missing-include.patch         \
   %D%/packages/patches/foobillard++-pkg-config.patch           \
   %D%/packages/patches/foomatic-filters-CVE-2015-8327.patch    \
   %D%/packages/patches/foomatic-filters-CVE-2015-8560.patch    \
diff --git a/gnu/packages/cpp.scm b/gnu/packages/cpp.scm
index 90e139e9eb..277f9da115 100644
--- a/gnu/packages/cpp.scm
+++ b/gnu/packages/cpp.scm
@@ -41,12 +41,23 @@
   #:use-module (guix build-system python)
   #:use-module (gnu packages)
   #:use-module (gnu packages autotools)
+  #:use-module (gnu packages boost)
   #:use-module (gnu packages check)
   #:use-module (gnu packages code)
   #:use-module (gnu packages compression)
+  #:use-module (gnu packages crypto)
+  #:use-module (gnu packages gcc)
+  #:use-module (gnu packages libevent)
+  #:use-module (gnu packages libunwind)
+  #:use-module (gnu packages liburing)
+  #:use-module (gnu packages linux)
   #:use-module (gnu packages llvm)
+  #:use-module (gnu packages logging)
+  #:use-module (gnu packages maths)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages popt)
+  #:use-module (gnu packages pretty-print)
   #:use-module (gnu packages tls)
   #:use-module (gnu packages web))

@@ -669,3 +680,65 @@ parsers according to a Parsing Expression Grammar
(PEG).")
 standard GNU style syntax for options.")
     (home-page "https://github.com/jarro2783/cxxopts/wiki")
     (license license:expat)))
+
+(define-public folly
+  (package
+    (name "folly")
+    (version "2020.09.21.00")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/facebook/folly")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0ppd02scbi4a52s99par4i17cys4z8gangpxa86yma48k72z5xvs"))
+              (patches (search-patches
"folly-add-missing-include.patch"))))
+    (build-system cmake-build-system)
+    (arguments
+     '(;; Tests must be explicitly enabled
+       ;#:configure-flags
+       ;'("-DBUILD_TESTS=ON")))
+       ;; Leave tests disabled; see
https://github.com/facebook/folly/issues/1456
+       #:tests? #f))
+    (propagated-inputs
+     `(("boost" ,boost)
+       ("gflags" ,gflags)
+       ("glog" ,glog)
+       ("liburing" ,liburing)))
+    (inputs
+     `(("bzip2" ,bzip2)
+       ("double-conversion" ,double-conversion)
+       ("fmt" ,fmt)
+       ("libaio" ,libaio)
+       ("libevent" ,libevent)
+       ("libiberty" ,libiberty)
+       ("libsodium" ,libsodium)
+       ("libunwind" ,libunwind)
+       ("lz4" ,lz4)
+       ("openssl" ,openssl)
+       ("snappy" ,snappy)
+       ("zlib" ,zlib)
+       ("zstd" ,zstd "lib")))
+    (native-inputs
+     `(("googletest" ,googletest)))
+    (synopsis "An open-source C++ library developed and used at Facebook")
+    (description
+     "Folly (acronymed loosely after Facebook Open Source Library) is a
library
+  of C++14 components designed with practicality and efficiency in mind.
Folly
+  contains a variety of core library components used extensively at
Facebook. In
+  particular, it's often a dependency of Facebook's other open source C++
efforts
+  and place where those projects can share code.
+
+  It complements (as opposed to competing against) offerings such as Boost
and of
+  course std. In fact, we embark on defining our own component only when
+  something we need is either not available, or does not meet the needed
+  performance profile. We endeavor to remove things from folly if or when
std or
+  Boost obsoletes them.
+
+  Performance concerns permeate much of Folly, sometimes leading to
designs that
+  are more idiosyncratic than they would otherwise be (see e.g.
PackedSyncPtr.h,
+  SmallLocks.h). Good performance at large scale is a unifying theme in
all of Folly.")
+    (home-page "https://github.com/facebook/folly/wiki")
+    (license license:asl2.0)))
diff --git a/gnu/packages/patches/folly-add-missing-include.patch
b/gnu/packages/patches/folly-add-missing-include.patch
new file mode 100644
index 0000000000..929239233f
--- /dev/null
+++ b/gnu/packages/patches/folly-add-missing-include.patch
@@ -0,0 +1,10 @@
+--- a/folly/concurrency/test/AtomicSharedPtrTest.cpp
++++ b/folly/concurrency/test/AtomicSharedPtrTest.cpp
+@@ -27,6 +27,7 @@
+ #include <folly/concurrency/AtomicSharedPtr.h>
+ #include <folly/concurrency/test/AtomicSharedPtrCounted.h>
+ #include <folly/portability/GTest.h>
++#include <folly/portability/GFlags.h>
+
+ #include <folly/test/DeterministicSchedule.h>
+
