diff --git a/d/dotNET-Core-Runtime/dotNET-Core-Runtime-2.1.0.eb b/d/dotNET-Core-Runtime/dotNET-Core-Runtime-2.0.7.eb
similarity index 92%
rename from d/dotNET-Core-Runtime/dotNET-Core-Runtime-2.1.0.eb
rename to d/dotNET-Core-Runtime/dotNET-Core-Runtime-2.0.7.eb
index 78bd1d53..fc1ab622 100644
--- a/d/dotNET-Core-Runtime/dotNET-Core-Runtime-2.1.0.eb
+++ b/d/dotNET-Core-Runtime/dotNET-Core-Runtime-2.0.7.eb
@@ -14,7 +14,10 @@ source_urls = ['https://download.microsoft.com/download/A/9/F/A9F8872C-48B2-41DB
 sources = ['dotnet-runtime-%(version)s-linux-x64.tar.gz']
 checksums = ['680ea40a1fafb7a6f93897df70077b64f0081b7d9b0f1358f5897ffd949d6b71']
 
-dependencies = [('libunwind', '1.2')]
+dependencies = [
+   ('libunwind', '1.2'),
+   ('glibc', '2.14')
+]
 
 sanity_check_paths = {
     'files': ['dotnet'],
diff --git a/d/dotNET-Core-SDK/dotNET-Core-SDK-2.1.200.eb b/d/dotNET-Core-SDK/dotNET-Core-SDK-2.1.200.eb
new file mode 100644
index 00000000..dcd715be
--- /dev/null
+++ b/d/dotNET-Core-SDK/dotNET-Core-SDK-2.1.200.eb
@@ -0,0 +1,25 @@
+easyblock = 'Tarball'
+
+# note: only works on recent OSs, required sufficiently recent glibc (2.14 or newer)
+name = 'dotNET-Core-SDK'
+version = '2.1.200'
+
+homepage = 'https://www.microsoft.com/net/'
+description = """.NET is a free, cross-platform, open source developer platform for building many different types
+ of applications."""
+
+toolchain = {'name': 'dummy', 'version': ''}
+
+source_urls = ['https://download.microsoft.com/download/3/7/1/37189942-C91D-46E9-907B-CF2B2DE584C7/']
+sources = ['dotnet-sdk-%(version)s-linux-x64.tar.gz']
+
+dependencies = [('libunwind', '1.2')]
+
+sanity_check_paths = {
+    'files': ['dotnet'],
+    'dirs': ['sdk'],
+}
+
+modextrapaths = {'PATH': ['']}
+
+moduleclass = 'lang'
diff --git a/p/Perl/Perl-5.26.2-GCC-6.3.0-2.27.eb b/p/Perl/Perl-5.26.2-GCC-6.3.0-2.27.eb
index de2a31a8..3b2af0e2 100644
--- a/p/Perl/Perl-5.26.2-GCC-6.3.0-2.27.eb
+++ b/p/Perl/Perl-5.26.2-GCC-6.3.0-2.27.eb
@@ -439,11 +439,11 @@ exts_list = [
         'source_urls': ['https://cpan.metacpan.org/authors/id/B/BI/BIGJ'],
         'checksums': ['2fc516e71f9ef453be22a4619d91eb3f78df414a57dfa0fd745d3bff50bf73d2'],
     }),
-    ('MRO::Compat', '0.13', {
-        'source_tmpl': 'MRO-Compat-%(version)s.tar.gz',
-        'source_urls': ['https://cpan.metacpan.org/authors/id/H/HA/HAARG'],
-        'checksums': ['8a2c3b6ccc19328d5579d02a7d91285e2afd85d801f49d423a8eb16f323da4f8'],
-    }),
+#    ('MRO::Compat', '0.13', {
+#        'source_tmpl': 'MRO-Compat-%(version)s.tar.gz',
+#        'source_urls': ['https://cpan.metacpan.org/authors/id/H/HA/HAARG'],
+#        'checksums': ['8a2c3b6ccc19328d5579d02a7d91285e2afd85d801f49d423a8eb16f323da4f8'],
+#    }),
     ('Moo', '2.003004', {
         'source_tmpl': 'Moo-%(version)s.tar.gz',
         'source_urls': ['https://cpan.metacpan.org/authors/id/H/HA/HAARG'],