diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f5532e3..d4faaea 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -124,3 +124,40 @@ jobs:
             gem install bundler
             bundle install
             bundle exec rake ${{ matrix.task }}
+
+  openbsd:
+    strategy:
+      fail-fast: false
+      matrix:
+        task: ["test:unit", "test:examples"]
+    runs-on: ubuntu-latest
+    env:
+      MAKE: gmake
+    steps:
+    - uses: actions/checkout@v4
+    - uses: vmactions/openbsd-vm@v1
+      with:
+        envs: MAKE
+        usesh: true
+        copyback: false
+        prepare: |
+          pkg_add ruby%3.1 gmake cmake git pkgconf security/gnupg
+          ln -sf /usr/local/bin/ruby31 /usr/local/bin/ruby
+          ln -sf /usr/local/bin/bundle31 /usr/local/bin/bundle
+          ln -sf /usr/local/bin/bundler31 /usr/local/bin/bundler
+          ln -sf /usr/local/bin/erb31 /usr/local/bin/erb
+          ln -sf /usr/local/bin/gem31 /usr/local/bin/gem
+          ln -sf /usr/local/bin/irb31 /usr/local/bin/irb
+          ln -sf /usr/local/bin/racc31 /usr/local/bin/racc
+          ln -sf /usr/local/bin/rake31 /usr/local/bin/rake
+          ln -sf /usr/local/bin/rbs31 /usr/local/bin/rbs
+          ln -sf /usr/local/bin/rdbg31 /usr/local/bin/rdbg
+          ln -sf /usr/local/bin/rdoc31 /usr/local/bin/rdoc
+          ln -sf /usr/local/bin/ri31 /usr/local/bin/ri
+          ln -sf /usr/local/bin/syntax_suggest31 /usr/local/bin/syntax_suggest
+          ln -sf /usr/local/bin/typeprof31 /usr/local/bin/typeprof
+        run: |
+          git config --global --add safe.directory /home/runner/work/mini_portile/mini_portile
+          gem install bundler
+          bundle install
+          bundle exec rake ${{ matrix.task }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0f0e54..76cc7b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,8 +4,10 @@
 
 #### Added
 
-- When setting the C compiler through the `MiniPortile` constructor, the preferred keyword argument is now `:cc_command`. The original `:gcc_command` is still supported. @flavorjones
-- GPG file verification error messages are captured in the raised exception. Previously these errors went to `stderr`. @flavorjones
+- When setting the C compiler through the `MiniPortile` constructor, the preferred keyword argument is now `:cc_command`. The original `:gcc_command` is still supported. (#144 by @flavorjones)
+- GPG file verification error messages are captured in the raised exception. Previously these errors went to `stderr`. (#145 by @flavorjones)
+- Add support for extracting xz-compressed tarballs on OpenBSD. (#141 by @postmodern)
+- Add OpenBSD support to the experimental method `MakeMakefile#mkmf_config`. (#141 by @flavorjones)
 
 
 ### 2.8.6 / 2024-04-14
diff --git a/lib/mini_portile2/mini_portile.rb b/lib/mini_portile2/mini_portile.rb
index 662a4e4..0607d3f 100644
--- a/lib/mini_portile2/mini_portile.rb
+++ b/lib/mini_portile2/mini_portile.rb
@@ -320,10 +320,8 @@ def mkmf_config(pkg: nil, dir: nil, static: nil)
     if static
       libdir = lib_path
       if pcfile
-        variables = minimal_pkg_config(pcfile, "print-variables").split("\n").map(&:strip)
-        if variables.include?("libdir")
-          libdir = minimal_pkg_config(pcfile, "variable=libdir")
-        end
+        pcfile_libdir = minimal_pkg_config(pcfile, "variable=libdir").strip
+        libdir = pcfile_libdir unless pcfile_libdir.empty?
       end
 
       #
@@ -510,30 +508,6 @@ def log_file(action)
       }
   end
 
-  TAR_EXECUTABLES = %w[gtar bsdtar tar basic-bsdtar]
-  def tar_exe
-    @@tar_exe ||= begin
-      TAR_EXECUTABLES.find { |c|
-        which(c)
-      } or raise("tar not found - please make sure that one of the following commands is in the PATH: #{TAR_EXECUTABLES.join(", ")}")
-    end
-  end
-
-  def tar_compression_switch(filename)
-    case File.extname(filename)
-      when '.gz', '.tgz'
-        'z'
-      when '.bz2', '.tbz2'
-        'j'
-      when '.xz'
-        'J'
-      when '.Z'
-        'Z'
-      else
-        ''
-    end
-  end
-
   # From: http://stackoverflow.com/a/5471032/7672
   # Thanks, Mislav!
   #
@@ -570,12 +544,35 @@ def detect_host
     end
   end
 
+  TAR_EXECUTABLES = %w[gtar bsdtar tar basic-bsdtar]
+  def tar_exe
+    @@tar_exe ||= begin
+      TAR_EXECUTABLES.find { |c|
+        which(c)
+      } or raise("tar not found - please make sure that one of the following commands is in the PATH: #{TAR_EXECUTABLES.join(", ")}")
+    end
+  end
+
+  def tar_command(file, target)
+    case File.extname(file)
+      when '.gz', '.tgz'
+        [tar_exe, 'xzf', file, '-C', target]
+      when '.bz2', '.tbz2'
+        [tar_exe, 'xjf', file, '-C', target]
+      when '.xz'
+        # NOTE: OpenBSD's tar command does not support the -J option
+        "xzcat #{file.shellescape} | #{tar_exe.shellescape} xf - -C #{target.shellescape}"
+      else
+        [tar_exe, 'xf', file, '-C', target]
+    end
+  end
+
   def extract_file(file, target)
     filename = File.basename(file)
     FileUtils.mkdir_p target
 
     message "Extracting #{filename} into #{target}... "
-    execute('extract', [tar_exe, "#{tar_compression_switch(filename)}xf", file, "-C", target], {:cd => Dir.pwd, :initial_message => false})
+    execute('extract', tar_command(file, target) , {:cd => Dir.pwd, :initial_message => false})
   end
 
   # command could be an array of args, or one string containing a command passed to the shell. See