diff --git a/Changes b/Changes
index bc8b8f3..6f929f6 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,10 @@
 Revision history for pmarkdown and the Markdown::Perl module.
 
+1.04 - 2024-05-09
+
+ - Remove our custom make targets on platforms that don’t have GNU Make to
+   avoid parse failures.
+
 1.03 - 2024-04-10
 
  - Disable hard line breaks using two spaces in our default syntax because they
diff --git a/Makefile.PL b/Makefile.PL
index 4387432..03b9854 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -45,14 +45,22 @@ WriteMakefile(
     clean => { FILES => 'Markdown-Perl-*' },
 );
 
+# These platforms (usually) have GNU Make by default so the syntax that we use
+# for our custom targets below will work (especially to export environment
+# variables).
+# On other platforms, we disable the custom parts of our Makefile generation, as
+# the generated Makefile would otherwise not parse correctly.
+sub supported_platform {
+  return $^O =~ m/^(?:linux|cygwin|MSWin32)$/;
+}
+
 sub MY::postamble {
   my ($self) = @_;
 
   my @postamble;
   push @postamble, ::postamble() if *::postamble{CODE};
 
-  # Solaris has a weird (?) make that does not support our `export` statements.
-  push @postamble, <<"MAKE_FRAGMENT" unless $^O eq 'solaris';
+  push @postamble, <<"MAKE_FRAGMENT" if supported_platform();
 ALL_PM := \$(shell find lib -name "*.pm")
 ALL_EXE := script/pmarkdown
 
@@ -79,6 +87,8 @@ spelling: export EXTENDED_TESTING = 1
 spelling:
 \t\$(PERLRUN) t/001-spelling.t --interactive
 
+test: export HARNESS_OPTIONS = j8:c
+
 alltest: export EXTENDED_TESTING = 1
 alltest: test
 
@@ -127,7 +137,7 @@ MAKE_FRAGMENT
 # End of the template. You can add custom content below this line.
 
 sub postamble {
-  return if $^O eq 'solaris';
+  return unless supported_platform();
   return <<"EOF";
 profile:
 \t-perl -Ilib -d:NYTProf t/900-cmark-test-suite.t --fast
@@ -139,8 +149,6 @@ clean:: clean_nytprof
 clean_nytprof:
 \trm -fr nytprof nytprof.out
 
-test: export HARNESS_OPTIONS = j8:c
-
 fuzzing: export MAXI_TEST = 1
 fuzzing:
 \tperl -Ilib t/801-fuzzing.t
diff --git a/dist_setup.conf b/dist_setup.conf
index 506716f..b08add0 100644
--- a/dist_setup.conf
+++ b/dist_setup.conf
@@ -9,6 +9,8 @@
   exe_files => ['script/pmarkdown'],
   min_perl_version => '5.026',
 
+  test_harness_options => 'j8:c',
+
   author => {
     name => 'Mathias Kende',
     email => 'mathias@cpan.org',
diff --git a/lib/App/pmarkdown.pm b/lib/App/pmarkdown.pm
index 8be66e7..36ec3ae 100644
--- a/lib/App/pmarkdown.pm
+++ b/lib/App/pmarkdown.pm
@@ -5,7 +5,7 @@ use warnings;
 
 use Markdown::Perl;
 
-our $VERSION = '1.03';  # Remember to also set the Markdown::Perl version.
+our $VERSION = '1.04';  # Remember to also set the Markdown::Perl version.
 
 1;
 
diff --git a/lib/Markdown/Perl.pm b/lib/Markdown/Perl.pm
index c5b0cf4..42dfcad 100644
--- a/lib/Markdown/Perl.pm
+++ b/lib/Markdown/Perl.pm
@@ -17,7 +17,7 @@ use Scalar::Util 'blessed';
 
 use parent 'Markdown::Perl::Options';
 
-our $VERSION = '1.03';  # Remember to also set the App::pmarkdown version.
+our $VERSION = '1.04';  # Remember to also set the App::pmarkdown version.
 
 our @EXPORT_OK = qw(convert set_options);
 our %EXPORT_TAGS = (all => \@EXPORT_OK);