diff --git a/dev-libs/mimalloc/mimalloc-2.1.2.recipe b/dev-libs/mimalloc/mimalloc-2.1.2.recipe
new file mode 100644
index 000000000..a2d66de97
--- /dev/null
+++ b/dev-libs/mimalloc/mimalloc-2.1.2.recipe
@@ -0,0 +1,69 @@
+SUMMARY="A compact general purpose allocator with excellent performance"
+DESCRIPTION="mimalloc (pronounced 'me-malloc') is a general purpose allocator with excellent \
+performance characteristics.
+Initially developed by Daan Leijen for the runtime systems of the Koka and Lean languages."
+HOMEPAGE="https://github.com/microsoft/mimalloc"
+COPYRIGHT="2018-2021 Microsoft Corporation, Daan Leijen"
+LICENSE="MIT"
+REVISION="1"
+SOURCE_URI="$HOMEPAGE/archive/refs/tags/v$portVersion.tar.gz"
+CHECKSUM_SHA256="2b1bff6f717f9725c70bf8d79e4786da13de8a270059e4ba0bdd262ae7be46eb"
+SOURCE_FILENAME="mimalloc-v$portVersion.tar.gz"
+PATCHES="mimalloc-$portVersion.patchset"
+
+ARCHITECTURES="all !x86_gcc2"
+SECONDARY_ARCHITECTURES="x86"
+
+libVersion="2.1"
+libVersionCompat="$libVersion compat >= ${libVersion%.*}"
+
+PROVIDES="
+	mimalloc$secondaryArchSuffix = $portVersion
+	lib:libmimalloc$secondaryArchSuffix = $libVersionCompat
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	lib:libatomic$secondaryArchSuffix
+	"
+
+PROVIDES_devel="
+	mimalloc${secondaryArchSuffix}_devel = $portVersion
+	devel:libmimalloc$secondaryArchSuffix = $libVersionCompat
+	"
+REQUIRES_devel="
+	mimalloc$secondaryArchSuffix == $portVersion base
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	"
+BUILD_PREREQUIRES="
+	cmd:cmake
+	cmd:gcc$secondaryArchSuffix
+	cmd:make
+	"
+
+BUILD()
+{
+	cmake -Bbuild -S. -DCMAKE_BUILD_TYPE=Release \
+		$cmakeDirArgs
+	make -C build $jobArgs
+}
+
+INSTALL()
+{
+	make -C build install
+
+	prepareInstalledDevelLib \
+		libmimalloc
+	fixPkgconfig
+
+	packageEntries devel \
+		$developDir \
+		$libDir/cmake
+}
+
+TEST()
+{
+	make -C build test
+}
diff --git a/dev-libs/mimalloc/patches/mimalloc-2.1.2.patchset b/dev-libs/mimalloc/patches/mimalloc-2.1.2.patchset
new file mode 100644
index 000000000..90b7bd580
--- /dev/null
+++ b/dev-libs/mimalloc/patches/mimalloc-2.1.2.patchset
@@ -0,0 +1,50 @@
+From 6c72e7b0df1484c7f8a6a1967030b31f6d6790d0 Mon Sep 17 00:00:00 2001
+From: Begasus <begasus@gmail.com>
+Date: Fri, 21 Jul 2023 12:49:43 +0000
+Subject: Don't hardcode install paths
+
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 2bcd1ef..72ea2f1 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -262,11 +262,6 @@ if(MI_USE_CXX)
+   endif()
+ endif()
+ 
+-if(CMAKE_SYSTEM_NAME MATCHES "Haiku")
+-   SET(CMAKE_INSTALL_LIBDIR ~/config/non-packaged/lib)
+-   SET(CMAKE_INSTALL_INCLUDEDIR ~/config/non-packaged/headers)
+- endif()
+-
+ # Compiler flags
+ if(CMAKE_C_COMPILER_ID MATCHES "AppleClang|Clang|GNU")
+   list(APPEND mi_cflags -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden)
+-- 
+2.37.3
+
+
+From ad9c184f58d2f1bec4907a86dd9b6faaba9c5274 Mon Sep 17 00:00:00 2001
+From: Begasus <begasus@gmail.com>
+Date: Fri, 21 Jul 2023 13:54:29 +0000
+Subject: Fix missing header on Haiku
+
+
+diff --git a/src/prim/unix/prim.c b/src/prim/unix/prim.c
+index 314281f..605a684 100644
+--- a/src/prim/unix/prim.c
++++ b/src/prim/unix/prim.c
+@@ -55,6 +55,10 @@ terms of the MIT license. A copy of the license can be found in the file
+   #include <sys/syscall.h>
+ #endif
+ 
++#if defined(__HAIKU__)
++#include <fcntl.h>
++#endif
++
+ //------------------------------------------------------------------------------------
+ // Use syscalls for some primitives to allow for libraries that override open/read/close etc.
+ // and do allocation themselves; using syscalls prevents recursion when mimalloc is 
+-- 
+2.37.3
+