diff --git a/var/spack/repos/builtin/packages/cli11/package.py b/var/spack/repos/builtin/packages/cli11/package.py
index 414c39ee88..88cd6d18c9 100644
--- a/var/spack/repos/builtin/packages/cli11/package.py
+++ b/var/spack/repos/builtin/packages/cli11/package.py
@@ -14,6 +14,7 @@ class Cli11(CMakePackage):
     url = "https://github.com/CLIUtils/CLI11/archive/v1.9.1.tar.gz"
     maintainers = ["nightlark"]
 
+    version("2.3.1", sha256="378da73d2d1d9a7b82ad6ed2b5bda3e7bc7093c4034a1d680a2e009eb067e7b2")
     version("2.1.1", sha256="d69023d1d0ab6a22be86b4f59d449422bc5efd9121868f4e284d6042e52f682e")
     version("2.1.0", sha256="2661b0112b02478bad3dc7f1749c4825bfc7e37b440cbb4c8c0e2ffaa3999112")
     version("2.0.0", sha256="2c672f17bf56e8e6223a3bfb74055a946fa7b1ff376510371902adb9cb0ab6a3")
diff --git a/var/spack/repos/builtin/packages/krb5/package.py b/var/spack/repos/builtin/packages/krb5/package.py
index 415a98170b..65bc147c0c 100644
--- a/var/spack/repos/builtin/packages/krb5/package.py
+++ b/var/spack/repos/builtin/packages/krb5/package.py
@@ -74,6 +74,10 @@ def configure_args(self):
         else:
             args.append("--disable-static")
 
+        # https://github.com/spack/spack/issues/34193
+        if "%gcc@10:" in self.spec:
+            args.append("CFLAGS=-fcommon")
+
         return args
 
     def setup_build_environment(self, env):
diff --git a/var/spack/repos/builtin/packages/libreproc/package.py b/var/spack/repos/builtin/packages/libreproc/package.py
new file mode 100644
index 0000000000..093f84d004
--- /dev/null
+++ b/var/spack/repos/builtin/packages/libreproc/package.py
@@ -0,0 +1,30 @@
+# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class Libreproc(CMakePackage):
+    """A cross-platform process library"""
+
+    homepage = "https://github.com/DaanDeMeyer/reproc/"
+    url = "https://github.com/DaanDeMeyer/reproc/archive/v14.2.4.tar.gz"
+
+    maintainers = ["charmoniumQ"]
+
+    version("14.2.4", sha256="55c780f7faa5c8cabd83ebbb84b68e5e0e09732de70a129f6b3c801e905415dd")
+
+    variant("cxx", default=False, description="Build reproc C++ bindings")
+    variant("shared", default=True, description="Build shared libraries")
+
+    depends_on("cmake@3.14:", type="build")
+    depends_on("zlib+shared", type="link", when="+shared")
+    depends_on("zlib~shared", type="link", when="~shared")
+
+    def cmake_args(self):
+        return [
+            self.define_from_variant("REPROC++", "cxx"),
+            self.define_from_variant("BUILD_SHARED_LIBS", "shared"),
+        ]
diff --git a/var/spack/repos/builtin/packages/libsolv/package.py b/var/spack/repos/builtin/packages/libsolv/package.py
new file mode 100644
index 0000000000..a62ffdfc27
--- /dev/null
+++ b/var/spack/repos/builtin/packages/libsolv/package.py
@@ -0,0 +1,31 @@
+# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class Libsolv(CMakePackage):
+    """Library for solving packages and reading repositories."""
+
+    homepage = "https://en.opensuse.org/OpenSUSE:Libzypp_satsolver"
+    url = "https://github.com/opensuse/libsolv/archive/0.7.22.tar.gz"
+
+    maintainers = ["charmoniumQ"]
+
+    version("0.7.22", sha256="968aef452b5493751fa0168cd58745a77c755e202a43fe8d549d791eb16034d5")
+
+    variant("shared", default=True, description="Build shared libraries")
+    variant("conda", default=False, description="Include solv/conda.h")
+
+    depends_on("expat", type="link")
+    depends_on("zlib+shared", type="link", when="+shared")
+    depends_on("zlib~shared", type="link", when="~shared")
+
+    def cmake_args(self):
+        return [
+            self.define("ENABLE_STATIC", "~shared" in self.spec),
+            self.define("DISABLE_DYNAMIC", "~shared" in self.spec),
+            self.define_from_variant("ENABLE_CONDA", "conda"),
+        ]
diff --git a/var/spack/repos/builtin/packages/micromamba/fix-threads.patch b/var/spack/repos/builtin/packages/micromamba/fix-threads.patch
new file mode 100644
index 0000000000..44e8788a1c
--- /dev/null
+++ b/var/spack/repos/builtin/packages/micromamba/fix-threads.patch
@@ -0,0 +1,19 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -13,6 +13,16 @@ cmake_policy(SET CMP0077 NEW)
+ #  cmake_policy(SET CMP0028 NEW)
+ #endif()
+ 
++# https://stackoverflow.com/questions/54587052/cmake-on-mac-could-not-find-threads-missing-threads-found
++# assume built-in pthreads on Unix
++IF(UNIX)
++    set(CMAKE_THREAD_LIBS_INIT "-lpthread")
++    set(CMAKE_HAVE_THREADS_LIBRARY 1)
++    set(CMAKE_USE_WIN32_THREADS_INIT 0)
++    set(CMAKE_USE_PTHREADS_INIT 1)
++    set(THREADS_PREFER_PTHREAD_FLAG ON)
++ENDIF()
++
+ project(mamba)
+ 
+ # Build options
diff --git a/var/spack/repos/builtin/packages/micromamba/package.py b/var/spack/repos/builtin/packages/micromamba/package.py
new file mode 100644
index 0000000000..f2bbc3d174
--- /dev/null
+++ b/var/spack/repos/builtin/packages/micromamba/package.py
@@ -0,0 +1,155 @@
+# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+linkage_url = (
+    "https://mamba.readthedocs.io/en/latest/developer_zone/build_locally.html#build-micromamba"
+)
+
+
+class Micromamba(CMakePackage):
+    """Mamba is a fast, robust, and cross-platform package manager (Miniconda alternative).
+
+    Micromamba is faster than Miniconda, and it is a standalone
+    executable, whereas Miniconda pulls in its own Python environment.
+
+    """
+
+    homepage = "https://mamba.readthedocs.io/"
+    url = "https://github.com/mamba-org/mamba/archive/micromamba-1.1.0.tar.gz"
+
+    maintainers = ["charmoniumQ"]
+
+    version("1.1.0", sha256="e2392cd90221234ae8ea92b37f40829fbe36d80278056269aa1994a5efe7f530")
+
+    variant(
+        "linkage",
+        default="dynamic",
+        description=f"See MICROMAMBA_LINKAGE in {linkage_url}.",
+        values=(
+            "dynamic",
+            "static",
+            # "full_static",
+        ),
+        multi=False,
+    )
+
+    patch("fix-threads.patch")
+
+    with when("linkage=dynamic"):
+        # See https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/CMakeLists.txt#L423
+        depends_on("libsolv+conda", type="link")
+        depends_on("curl libs=shared", type="link")
+        depends_on("libarchive crypto=mbedtls xar=libxml2", type="link")
+        depends_on("openssl", type="link")
+        depends_on("yaml-cpp", type="link")
+        depends_on("libreproc+cxx+shared", type="link")
+        depends_on("tl-expected@2022-11-24", type="link")
+        depends_on("fmt", type="link")
+        depends_on("spdlog", type="link")
+
+        # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/include/mamba/core/validate.hpp#L13
+        depends_on("nlohmann-json", type="link")
+
+        # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/src/core/context.cpp#L7
+        depends_on("cpp-termcolor", type="link")
+
+        # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/micromamba/src/common_options.hpp#L12
+        depends_on("cli11@2.2:", type="link")
+
+    with when("linkage=static"):
+        # When linkage is static, BUILD_STATIC=ON
+        # and then
+        # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/CMakeLists.txt#L523
+        # calls libmamba_create_target(libmamba-static STATIC SHARED libmamba)
+        # where the third argument, SHARED, is the deps_linkage
+        # as defined here,
+        # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/CMakeLists.txt#L256
+        # which would use dynamic linkage here,
+        # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/CMakeLists.txt#L420
+        # See linkage=dynamic for what that entails.
+        depends_on("libsolv+conda", type="link")
+        depends_on("curl libs=shared", type="link")
+        depends_on("libarchive crypto=mbedtls xar=libxml2", type="link")
+        depends_on("openssl", type="link")
+        depends_on("yaml-cpp", type="link")
+        depends_on("libreproc+cxx", type="link")
+        depends_on("tl-expected@2022-11-24", type="link")
+        depends_on("fmt", type="link")
+        depends_on("spdlog", type="link")
+        depends_on("nlohmann-json", type="link")
+        depends_on("cpp-termcolor", type="link")
+        depends_on("cli11@2.2:", type="link")
+
+    if False:
+        # This variant currently fails with:
+        #
+        #     libarchive/archive_digest.c:191: undefined reference to `mbedtls_sha512_free'
+        #
+        # These shouldn't be necessary,
+        # since they are already in 'libarchive crypto=mbedtls xar=libxml2'
+        # but even adding them doesn't fix it.
+        #
+        #     depends_on("libxml2", type="link")
+        #     depends_on("mbedtls", type="link")
+        #
+        # However, I wanted to live this variant in the code,
+        # so it serves as a starting point.
+
+        with when("linkage=full_static"):
+            # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/CMakeLists.txt#L276
+            depends_on("curl libs=static", type="link")
+            depends_on("libssh2~shared", type="link")
+            depends_on("krb5~shared", type="link")
+            depends_on("openssl~shared", type="link")
+            depends_on("libarchive crypto=mbedtls xar=libxml2", type="link")
+            depends_on("iconv", type="link")
+            depends_on("bzip2", type="link")
+            depends_on("lz4", type="link")
+            depends_on("zstd", type="link")
+            depends_on("zlib", type="link")
+            depends_on("xz libs=static", type="link")
+            depends_on("lzo", type="link")
+            depends_on("libsolv+conda~shared", type="link")
+            depends_on("nghttp2", type="link")
+            depends_on("yaml-cpp~shared", type="link")
+            depends_on("libreproc+cxx~shared", type="link")
+
+            # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/CMakeLists.txt#L342
+            depends_on("fmt", type="link")
+            depends_on("spdlog~shared", type="link")
+
+            # https://github.com/mamba-org/mamba/blob/micromamba-1.0.0/libmamba/include/mamba/core/error_handling.hpp#L9
+            depends_on("tl-expected@2022-11-24", type="link")
+
+            # See linkage=dynamic for usage location
+            depends_on("nlohmann-json", type="link")
+            depends_on("cpp-termcolor", type="link")
+            depends_on("cli11@2.2:", type="link")
+
+    def cmake_args(self):
+        # See https://mamba.readthedocs.io/en/latest/developer_zone/build_locally.html#build-micromamba
+        if "linkage=dynamic" in self.spec:
+            linkage = "dynamic"
+        elif "linkage=static" in self.spec:
+            linkage = "static"
+        elif "linkage=full_static" in self.spec:
+            linkage = "full_static"
+        else:
+            raise ValueError(f"Unknown linkage type {self.spec}")
+        return [
+            self.define("BUILD_LIBMAMBA", True),
+            self.define("BUILD_MICROMAMBA", True),
+            self.define("BUILD_STATIC", linkage == "static"),
+            self.define("BUILD_STATIC_DEPS", linkage == "full_static"),
+            self.define("BUILD_SHARED", linkage == "dynamic"),
+            self.define("MICROMAMBA_LINKAGE", linkage.upper()),
+        ]
+
+    @run_after("install")
+    @on_package_attributes(run_tests=True)
+    def check_install(self):
+        Executable("micromamba")("--version")
diff --git a/var/spack/repos/builtin/packages/tl-expected/package.py b/var/spack/repos/builtin/packages/tl-expected/package.py
new file mode 100644
index 0000000000..57d5ac83a6
--- /dev/null
+++ b/var/spack/repos/builtin/packages/tl-expected/package.py
@@ -0,0 +1,23 @@
+# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class TlExpected(CMakePackage):
+    """C++11/14/17 std::expected with functional-style extensions."""
+
+    homepage = "https://tl.tartanllama.xyz/en/latest/"
+    url = "https://github.com/TartanLlama/expected/archive/1.0.0.tar.gz"
+    git = "https://github.com/TartanLlama/expected.git"
+
+    maintainers = ["charmoniumQ"]
+
+    # Note that the 1.0.0 has this issue:
+    # https://github.com/TartanLlama/expected/issues/114
+    # But no new patch version has been released,
+    # so I will use the latest commit at the time of writing:
+    version("2022-11-24", commit="b74fecd4448a1a5549402d17ddc51e39faa5020c")
+    version("1.0.0", sha256="8f5124085a124113e75e3890b4e923e3a4de5b26a973b891b3deb40e19c03cee")