diff --git a/build-fail-blacklist b/build-fail-blacklist
index 995eabd6756e3..79a87cd4c341f 100644
--- a/build-fail-blacklist
+++ b/build-fail-blacklist
@@ -1,3 +1,6 @@
+# Unclear that the following old versions are still needed
+recipes/hmmer/2.3.2
+
 # The build string needs to be modified to account for the [nocairo] feature
 recipes/genometools-genometools/1.5.10-nocairo
 
diff --git a/recipes/clustalw/meta.yaml b/recipes/clustalw/meta.yaml
index f15b3361a9a6d..e42ee9a7bfa6e 100644
--- a/recipes/clustalw/meta.yaml
+++ b/recipes/clustalw/meta.yaml
@@ -8,7 +8,7 @@ package:
   version: 2.1
 
 build:
-  number: 2
+  number: 3
   skip: False
 
 source:
diff --git a/recipes/hmmer/meta.yaml b/recipes/hmmer/meta.yaml
index e6d8188d36464..9b24a05e73c5e 100644
--- a/recipes/hmmer/meta.yaml
+++ b/recipes/hmmer/meta.yaml
@@ -7,7 +7,7 @@ source:
   sha256: a56129f9d786ec25265774519fc4e736bbc16e4076946dcbd7f2c16efc8e2b9c
 
 build:
-  number: 0
+  number: 1
 
 requirements:
   build:
diff --git a/recipes/pybedtools/0.6.9/meta.yaml b/recipes/pybedtools/0.6.9/meta.yaml
index 29321a936679d..5a4a02e278b1a 100644
--- a/recipes/pybedtools/0.6.9/meta.yaml
+++ b/recipes/pybedtools/0.6.9/meta.yaml
@@ -7,12 +7,12 @@ source:
   md5: a24e4bcd0c89beb9535295db964f6a4a
 
 build:
-  number: 2
+  number: 3
   skip: True # [py3k]
 
 requirements:
   build:
-    - {{ compiler('c') }}
+    - {{ compiler('cxx') }}
   host:
     - python
     - six
diff --git a/recipes/pybedtools/meta.yaml b/recipes/pybedtools/meta.yaml
index 28fdb83d3b66e..70002b7265559 100644
--- a/recipes/pybedtools/meta.yaml
+++ b/recipes/pybedtools/meta.yaml
@@ -7,11 +7,11 @@ source:
   sha256: 4eebd2cd1764ee1c604fd881703c3e329195485350b987b7fb8db42d232984f6
 
 build:
-  number: 0
+  number: 1
 
 requirements:
   build:
-    - {{ compiler('c') }}
+    - {{ compiler('cxx') }}
   host:
     - python
     - six