diff --git a/srcpkgs/justbuild/files/1b068c12b31b4a484bf49964b3057e6466b8953a.patch b/srcpkgs/justbuild/files/1b068c12b31b4a484bf49964b3057e6466b8953a.patch
new file mode 100644
index 00000000000..5694481e46a
--- /dev/null
+++ b/srcpkgs/justbuild/files/1b068c12b31b4a484bf49964b3057e6466b8953a.patch
@@ -0,0 +1,45 @@
+From 1b068c12b31b4a484bf49964b3057e6466b8953a Mon Sep 17 00:00:00 2001
+From: "Klaus T. Aehlig" <aehlig@linta.de>
+Date: Sun, 27 Aug 2023 16:35:52 +0200
+Subject: [PATCH] absl: avoid off64_t
+
+... to improve portability
+---
+ etc/import/absl/base/TARGETS.absl |  5 +++++
+ etc/patches/direct_mmap.h.diff    | 11 +++++++++++
+ 2 files changed, 16 insertions(+)
+ create mode 100644 etc/patches/direct_mmap.h.diff
+
+diff --git a/etc/import/absl/base/TARGETS.absl b/etc/import/absl/base/TARGETS.absl
+index 7383de5..168c1eb 100644
+--- a/etc/import/absl/base/TARGETS.absl
++++ b/etc/import/absl/base/TARGETS.absl
+@@ -366,6 +366,11 @@
+     , "raw_logging_internal"
+     ]
+   }
++, "internal/direct_mmap.h":
++  { "type": ["@", "rules", "patch", "file"]
++  , "src": [["FILE", null, "internal/direct_mmap.h"]]
++  , "patch": [["@", "patches", "", "direct_mmap.h.diff"]]
++  }
+ , "prefetch":
+   { "type": ["@", "rules", "CC", "library"]
+   , "name": ["prefetch"]
+diff --git a/etc/patches/direct_mmap.h.diff b/etc/patches/direct_mmap.h.diff
+new file mode 100644
+index 0000000..8c400e2
+--- /dev/null
++++ b/etc/patches/direct_mmap.h.diff
+@@ -0,0 +1,11 @@
++--- direct_mmap.h.orig	2023-08-27 16:22:17.101255129 +0200
+++++ direct_mmap.h	2023-08-27 16:23:26.048355108 +0200
++@@ -72,7 +72,7 @@
++ // Platform specific logic extracted from
++ // https://chromium.googlesource.com/linux-syscall-support/+/master/linux_syscall_support.h
++ inline void* DirectMmap(void* start, size_t length, int prot, int flags, int fd,
++-                        off64_t offset) noexcept {
+++                        int64_t offset) noexcept {
++ #if defined(__i386__) || defined(__ARM_ARCH_3__) || defined(__ARM_EABI__) || \
++     defined(__m68k__) || defined(__sh__) ||                                  \
++     (defined(__hppa__) && !defined(__LP64__)) ||                             \
diff --git a/srcpkgs/justbuild/template b/srcpkgs/justbuild/template
index 1eb7a9a08c3..51a41c2b02b 100644
--- a/srcpkgs/justbuild/template
+++ b/srcpkgs/justbuild/template
@@ -1,7 +1,7 @@
 # Template file for 'justbuild'
 pkgname=justbuild
-version=1.1.4
-revision=3
+version=1.2.1
+revision=1
 create_wrksrc=yes
 hostmakedepends="jo pandoc pkg-config python3 tar unzip wget"
 makedepends="abseil-cpp-devel c-ares-devel catch2 fmt-devel grpc-devel json-c++
@@ -13,7 +13,7 @@ license="Apache-2.0"
 homepage="https://github.com/just-buildsystem/justbuild/"
 changelog="https://github.com/just-buildsystem/justbuild/blob/master/CHANGELOG.md"
 distfiles="https://github.com/just-buildsystem/justbuild/archive/v${version}.tar.gz"
-checksum=850b570ae6da047a5227dca9029225ef7d7d988522924e445e90ae62bf2ca6ae
+checksum=0fe771914265d3edae0ee17daf2be48ed602e33a0cd1b0d04d822c0b8cb488a4
 conflicts="just>=0"
 nocross="not supported by bootstrapping"
 
@@ -39,6 +39,7 @@ do_build() {
 		bazel_remote_apis \
 		cli11 \
 		com_github_microsoft_gsl \
+		com_google_absl \
 		google_apis \
 		protobuf
 	)