Arch Linux User Repository

Why does it still say provides=(python-libmambapy) then?

Was in a hurry and forgot to remove it.

Can the fmt incompatibility be fixed? The conda package depends on python-libmambapy.

I think so. On the surface it looks like there were only a few breaking API changes limited to a single file. If I have some time today, I'll do a deeper dive and try to get a working patch.

EDIT: Also, once we get this working, I think it's safe to delete the python-libmamba package.

I also had to disable building libmambapy

Why does it still say provides=(python-libmambapy) then?

Can the fmt incompatibility be fixed? The conda package depends on python-libmambapy.

@anlorn, I stand corrected. Looks like patching the CMakeLists.txt file fixed the issue.

EDIT: I also had to disable building libmambapy due to the incompatibility with fmt>=11.x.

PKGBUILD:

# Maintainer: Carlos Aznarán <caznaranl@uni.pe>
# Contributor: Guillaume Dolle  <dev at gdolle.com>
pkgname=micromamba
_pkgname=${pkgname/micro/}
pkgver=2.1.1
pkgrel=2
pkgdesc="The fast cross-platform package manager"
arch=(i686 x86_64)
url="https://github.com/${_pkgname}-org/${_pkgname}"
license=(BSD-3-Clause)
depends=(python fmt libsolv reproc yaml-cpp simdjson)
makedepends=(cli11 spdlog tl-expected nlohmann-json cmake pybind11) # gtest
source=(${pkgname}-${pkgver}.tar.gz::${url}/archive/${pkgver}.tar.gz
    static-off.patch)
sha512sums=('99777c9711af0f36731aa3be9fd89cd730ab1878d4c9485fb0d5d39464ee13e29d6e8a5f4ecb4cbb0149c9a2962d91cb212e9a052536283b46a9e1776ed6899f'
    'SKIP')
provides=("libmamba=${pkgver}" "python-libmambapy=${pkgver}")
conflicts=('micromamba-bin' 'python-libmamba')

prepare() {
  cd ${_pkgname}-${pkgver}
  patch -p0 -i ../../static-off.patch
}

build() {
  cmake \
    -S ${_pkgname}-${pkgver} \
    -B build \
    -DBUILD_SHARED=ON \
    -DCMAKE_BUILD_TYPE=None \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
    -DBUILD_LIBMAMBA=ON \
    -DBUILD_LIBMAMBAPY=OFF \
    -DBUILD_LIBMAMBA_TESTS=OFF \
    -DBUILD_MAMBA_PACKAGE=OFF \
    -DBUILD_MICROMAMBA=ON \
    -DBUILD_STATIC=OFF \
    -Wno-dev
  cmake --build build
}

check() {
  ctest --test-dir build
}

package() {
  DESTDIR="${pkgdir}" cmake --build build --target install
  install -Dm 644 ${_pkgname}-${pkgver}/${pkgname}/LICENSE -t "${pkgdir}/usr/share/licenses/${pkgname}"
}

static-off.patch:

--- CMakeLists.txt.orig 2025-05-27 19:39:41.831173013 +0000
+++ CMakeLists.txt  2025-05-27 19:40:21.521306004 +0000
@@ -68,7 +68,8 @@

 # micromamba requires static linkage
 if(BUILD_MICROMAMBA)
-    set(BUILD_STATIC ON)
+    set(BUILD_STATIC OFF)
+    set(BUILD_SHARED ON)
 endif()

 # libmamba library and tests

I think I already tried to patch that but ran into some errors.

From the documentation, it sounds like -DBUILD_MICROMAMBA is only meant to be built statically. I don't think that trying to force it to use BUILD_SHARED is going to get us anywhere.

In the meantime, I tried setting -DBUILD_MICROMAMBA=OFF and adding -DBUILD_MAMBA=ON.

-DBUILD_MAMBA is meant to be used for compiling micromamba dynamically, so it seems like that might be what we want. There is already a micromamba-bin package for the standalone static version.

With that being said, I ran into more issues with libmambapy and its fmt dependency. libmambapy is expecting v10.1.1 (I think), but fmt is v11.2.0.

I spent a couple of hours trying to get a working patch, but to no avail.

I'll try some additional build flag combos to see if we can get a working version, but eventually the micromamba upstream is going to need to update libmambapy to use fmt v11.0.0 at the very least.

Looks like mamba cmake enforces static compiling when build as micromamba

if(BUILD_MICROMAMBA)
    set(BUILD_STATIC ON)
endif()

Trying to build this, I get the following error:

CMake Error at cmake/Checks.cmake:9 (message):
  Expected type "STATIC_LIBRARY" for target "yaml-cpp::yaml-cpp" but found
  "SHARED_LIBRARY"
Call Stack (most recent call first):
  libmamba/CMakeLists.txt:469 (mamba_target_check_type)
  libmamba/CMakeLists.txt:706 (libmamba_create_target)


-- Configuring incomplete, errors occurred!
==> ERROR: A failure occurred in build().
    Aborting...
 -> error making: micromamba-exit status 4
 -> Failed to install the following packages. Manual intervention is required:

I've tried several patches to get around the "STATIC_LIBRARY" error, installing static versions of yaml-cpp, reproc, and reproc++, and building with a different combination of flags--all to no avail.

AFAICT, no changes have been made to yaml-cpp since this package was last published.

It seems like -DBUILD_SHARED=ON and -DBUILD_STATIC=OFF aren't being respected.

I'm not sure what to do at this point or if anyone else has run into the same error.

==> Сборка пакета micromamba 2.1.0-1 (Пт 18 апр 2025 17:15:37)
==> Проверка зависимостей для запуска...
==> Проверка зависимостей для сборки...
==> Получение исходных файлов...
  -> Найден micromamba-2.1.0.tar.gz
==> Проверка файлов source с использованием sha512sums...
    micromamba-2.1.0.tar.gz ... Готово
==> Удаление директории '$srcdir/'...
==> Распаковка исходных файлов...
  -> Распаковка 'micromamba-2.1.0.tar.gz' с помощью bsdtar
==> Исходные файлы готовы.
==> Сборка пакета micromamba 2.1.0-1 (Пт 18 апр 2025 17:15:38)
==> Проверка зависимостей для запуска...
==> Проверка зависимостей для сборки...
==> ВНИМАНИЕ: Использование существующего дерева исходных файлов в '$srcdir/'
==> Удаление директории '$pkgdir/'...
==> Запускается build()...
-- The C compiler identification is GNU 14.2.1
-- The CXX compiler identification is GNU 14.2.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Building libmamba v2.1.0
-- libmamba binary version: v3.0.0
-- Found Python3: /usr/bin/python3.13 (found version "3.13.2") found components: Interpreter
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Found nlohmann_json: /usr/share/cmake/nlohmann_json/nlohmann_jsonConfig.cmake (found version "3.12.0")
-- Found PkgConfig: /usr/bin/pkg-config (found version "2.4.3")
-- Found Libsolv: /usr/include (found version "0.7.31")
-- Skipping LTO for target libmamba::solv-cpp, the build type is not a release
-- Adding shared libmamba target
-- Skipping LTO for target libmamba::libmamba-dyn, the build type is not a release
   -> Dynamically linking against libmamba (shared) dependencies
-- Found CURL: /usr/lib/libcurl.so (found version "8.13.0")
-- Found LibArchive: /usr/lib/libarchive.so (found version "3.7.9")
-- Found BZip2: /usr/lib/libbz2.so (found version "1.0.8")
-- Looking for BZ2_bzCompressInit
-- Looking for BZ2_bzCompressInit - found
-- Found OpenSSL: /usr/lib/libcrypto.so (found version "3.5.0")
-- Adding static libmamba target
-- Skipping LTO for target libmamba::libmamba-static, the build type is not a release
   -> Statically linking against libmamba (static) dependencies
CMake Error at cmake/Checks.cmake:9 (message):
  Expected type "STATIC_LIBRARY" for target "yaml-cpp::yaml-cpp" but found
  "SHARED_LIBRARY"
Call Stack (most recent call first):
  libmamba/CMakeLists.txt:469 (mamba_target_check_type)
  libmamba/CMakeLists.txt:706 (libmamba_create_target)


-- Configuring incomplete, errors occurred!
==> ОШИБКА: Произошел сбой в build().
    Прерывание...
 -> Failed to install layer, rolling up to next layer.error:error making: micromamba - exit status 4

pacman -Ss yaml-cpp

extra/yaml-cpp 0.8.0-2 [installed]
    YAML parser and emitter in C++, written around the YAML 1.2 spec

If someone Arch Linux User found a solution, please share here.

OK, thanks to henriii, we got it!

pkgname=micromamba
pkgver=2.0.0
_srcver=2024.09.25 
_name=mamba-$_srcver
pkgrel=1
pkgdesc="The fast cross-platform package manager"
arch=('x86_64')
url="https://github.com/mamba-org/mamba"
license=('BSD-3-Clause')
depends=(
  'fmt'
  'libsolv'
  'python>=3.9'
  'reproc'
  'yaml-cpp>=0.8.0'
  'simdjson'
)
makedepends=(
  # header-only libs
  'cli11'
  'spdlog'
  'tl-expected'
  'nlohmann-json'
  # C++ build tools
  'ccache'
  'python-cmake>=3.18'
  'doctest'
  'python-ninja'
  'pybind11'
  # python build tools
  'python-build'
  'python-installer'
  'python-scikit-build>=0.13'
  'python-setuptools>=42'
  'python-wheel'
)
provides=("libmamba=$pkgver" "python-libmambapy=$pkgver")
replaces=('python-libmamba')
conflicts=('python-libmamba')
#options=(!emptydirs)
#backup=(etc/conda/condarc)
source=("$_name-$pkgver.tar.gz::$url/archive/refs/tags/$_srcver.tar.gz")
sha512sums=('6b3e64255f8aa63723dd08f578f79195b46249a02002b6d0d77713fd181f0557e3b6044075a823e639b0240b07b4e17dd0c9c17790c9152a68992e3ca9a599fa')

build() {
  cd "$srcdir/$_name"

  cmake -S. -Bbuild \
    -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON \
    -DBUILD_LIBMAMBA=ON \
    -DBUILD_LIBMAMBAPY=ON \
    -DBUILD_MICROMAMBA=ON \
    -DBUILD_MAMBA_PACKAGE=ON \
    -DBUILD_SHARED=ON
  cmake --build build --parallel 8
  cmake --install build --prefix install

  cd libmambapy
  export SKBUILD_CONFIGURE_OPTIONS="\
      -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON \
      -DBUILD_LIBMAMBA=ON \
      -DBUILD_LIBMAMBAPY=ON \
      -DBUILD_MICROMAMBA=ON \
      -DBUILD_MAMBA_PACKAGE=ON \
      -Dlibmamba_ROOT=$PWD/../install"
  python -m build -x --wheel --no-isolation
}

package() {
  cd "$srcdir/$_name"
  cmake --install build/ --prefix "$pkgdir/usr"

  cd "$srcdir/$_name/libmambapy"
  python -m installer --destdir="$pkgdir" dist/*.whl

  install -Dm 644 LICENSE $pkgdir/usr/share/licenses/${pkgname}/LICENSE.txt
}

OK, it also has some more build dependencies: python-cmake and python-ninja

python-ninja exists, and I packaged https://aur.archlinux.org/packages/python-cmake-bin for that reason. We might want to change it so it uses system cmake!

Once you updated this package to build and to have provides=(... python-libmamba) I can retire https://aur.archlinux.org/packages/python-libmamba

I think I’m almost at a point where I’m getting this to build. Only problem is that 2.0 calls cmake on its own, and I’m unsure how to deal with it. I asked the scikit-build people for help, let’s see.