diff --git a/lib/const.rb b/lib/const.rb
index 397a0cf63..012e051c1 100644
--- a/lib/const.rb
+++ b/lib/const.rb
@@ -4,7 +4,7 @@ require 'etc'
 require 'open3'
 
 OLD_CREW_VERSION ||= defined?(CREW_VERSION) ? CREW_VERSION : '1.0'
-CREW_VERSION ||= '1.62.0' unless defined?(CREW_VERSION) && CREW_VERSION == OLD_CREW_VERSION
+CREW_VERSION ||= '1.62.1' unless defined?(CREW_VERSION) && CREW_VERSION == OLD_CREW_VERSION
 
 # Kernel architecture.
 KERN_ARCH ||= Etc.uname[:machine]
diff --git a/lib/convenience_functions.rb b/lib/convenience_functions.rb
index c4ecac6f9..eb5877924 100644
--- a/lib/convenience_functions.rb
+++ b/lib/convenience_functions.rb
@@ -9,6 +9,7 @@ require_relative 'downloader'
 # Reimplementation of .blank? method from ActiveSupport
 class NilClass; def blank? = true;         end
 class Numeric;  def blank? = false;        end
+class Proc;     def blank? = false;        end
 class Array;    def blank? = empty?;       end
 class Hash;     def blank? = empty?;       end
 class Symbol;   def blank? = empty?;       end
diff --git a/lib/downloader.rb b/lib/downloader.rb
index a5b935593..bf6424892 100644
--- a/lib/downloader.rb
+++ b/lib/downloader.rb
@@ -3,6 +3,7 @@ require 'io/console'
 require 'uri'
 require_relative 'const'
 require_relative 'color'
+require_relative 'convenience_functions'
 require_relative 'progress_bar'
 require_relative 'require_gem'
 
diff --git a/lib/fixup.rb b/lib/fixup.rb
index 3eb2bd3f3..f31204708 100644
--- a/lib/fixup.rb
+++ b/lib/fixup.rb
@@ -4,6 +4,7 @@ require 'etc'
 require 'json'
 require 'open3'
 require_relative 'color'
+require_relative 'convenience_functions'
 require_relative 'package'
 require_relative 'require_gem'
 
diff --git a/lib/package.rb b/lib/package.rb
index ee49d7b9f..11c3d690a 100644
--- a/lib/package.rb
+++ b/lib/package.rb
@@ -2,6 +2,7 @@ require 'English'
 require 'json'
 require_relative 'const'
 require_relative 'color'
+require_relative 'convenience_functions'
 require_relative 'package_helpers'
 require_relative 'require_gem'
 require_relative 'selector'
@@ -360,7 +361,7 @@ class Package
     rescue RuntimeError => e
       # Print failed line number and error message.
       puts "#{e.backtrace[1]}: #{e.message}".orange
-      raise InstallError, "`#{env.map { |k, v| "#{k}=\"#{v}\"" }.join(' ')} #{cmd_args.join(' ')}` exited with #{$CHILD_STATUS.exitstatus}".lightred
+      raise InstallError, "`#{env.map { |k, v| "#{k}=\"#{v}\"" }.join(' ')} #{args.join(' ')}` exited with #{$CHILD_STATUS.exitstatus}".lightred
     end
   end
 end
diff --git a/lib/report_buildsystem_methods.rb b/lib/report_buildsystem_methods.rb
index 2e3ae68f3..8febb2ba3 100644
--- a/lib/report_buildsystem_methods.rb
+++ b/lib/report_buildsystem_methods.rb
@@ -1,7 +1,7 @@
 module ReportBuildsystemMethods
   def print_buildsystem_methods
     boolean_list = available_boolean_properties
-    method_list = methods.reject(&->(m) { boolean_list.include?(m.to_s.delete_suffix('?').to_sym) }).grep(/#{superclass.to_s.downcase}_/).delete_if { |i| send(i).blank? }
+    method_list = methods.reject(&->(m) { boolean_list.include?(m.to_s.delete_suffix('?').to_sym) }).grep(/#{superclass.to_s.downcase}_/).select(&->(i) { send(i) })
 
     unless method_list.empty?
       require_gem 'method_source'