diff --git a/modules/ksb/Application.pm b/modules/ksb/Application.pm
--- a/modules/ksb/Application.pm
+++ b/modules/ksb/Application.pm
@@ -2406,6 +2406,9 @@
 sub _checkForEssentialBuildPrograms
 {
     my $ctx = assert_isa(shift, 'ksb::BuildContext');
+    my $kdedir = $ctx->getOption('kdedir');
+    my $qtdir = $ctx->getOption('qtdir');
+    my @preferred_paths = ("$kdedir/bin", "$qtdir/bin");
 
     return 1 if pretending();
 
@@ -2432,7 +2435,8 @@
             cmake => 'CMake',
         );
 
-        my $programPath = absPathToExecutable($prog);
+        my $preferredPath = absPathToExecutable2($prog, @preferred_paths);
+        my $programPath = $preferredPath || absPathToExecutable($prog);
 
         # qmake is not necessarily named 'qmake'
         if (!$programPath && $prog eq 'qmake') {
@@ -2442,7 +2446,8 @@
         if (!$programPath) {
             # Don't complain about Qt if we're building it...
             if ($prog eq 'qmake' && (
-                    grep { $_->buildSystemType() eq 'Qt' } (@buildModules)) ||
+                    grep { $_->buildSystemType() eq 'Qt' ||
+                           $_->buildSystemType() eq 'Qt5' } (@buildModules)) ||
                     pretending()
                 )
             {
diff --git a/modules/ksb/Module.pm b/modules/ksb/Module.pm
--- a/modules/ksb/Module.pm
+++ b/modules/ksb/Module.pm
@@ -642,11 +642,24 @@
     my $self = assert_isa(shift, 'ksb::Module');
     my $ctx = $self->buildContext();
     my $kdedir = $self->getOption('kdedir');
+    my $qtdir = $self->getOption('qtdir');
     my $prefix = $self->installationPath();
 
     # Add global set-envs and context
     $self->buildContext()->applyUserEnvironment();
 
+    # Avoid moving /usr up in env vars
+    if ($qtdir ne '/usr') {
+        my @qt_pkg_config_dirs = ("$qtdir/lib/pkgconfig");
+        $ctx->prependEnvironmentValue('PKG_CONFIG_PATH', @qt_pkg_config_dirs);
+
+        my @qt_ld_dirs = ("$qtdir/lib");
+        $ctx->prependEnvironmentValue('LD_LIBRARY_PATH', @qt_ld_dirs);
+
+        my @qt_path = ("$qtdir/bin");
+        $ctx->prependEnvironmentValue('PATH', @qt_path);
+    }
+
     # Avoid moving /usr up in env vars
     if ($kdedir ne '/usr') {
         my @pkg_config_dirs = ("$kdedir/lib/pkgconfig");
diff --git a/modules/ksb/Util.pm b/modules/ksb/Util.pm
--- a/modules/ksb/Util.pm
+++ b/modules/ksb/Util.pm
@@ -19,7 +19,7 @@
 
 use Exporter qw(import); # Use Exporter's import method
 our @EXPORT = qw(list_has assert_isa assert_in any unique_items
-                 absPathToExecutable
+                 absPathToExecutable absPathToExecutable2
                  fileDigestMD5 log_command disable_locale_message_translation
                  trimmed
                  split_quoted_on_whitespace safe_unlink safe_system p_chdir
@@ -48,11 +48,20 @@
 {
     my $prog = shift;
     my @paths = split(/:/, $ENV{'PATH'});
+    return absPathToExecutable2($prog, @paths);
+}
+
+# Subroutine to return the path to the given executable based on the
+# given paths.  e.g. if you pass (make, foo, bar) you could get '/foo/make'.
+# If the executable is not found undef is returned.
+sub absPathToExecutable2
+{
+    my $prog = shift;
 
     # If it starts with a / the path is already absolute.
     return $prog if $prog =~ /^\//;
 
-    for my $path (@paths)
+    for my $path (@_)
     {
         return "$path/$prog" if (-x "$path/$prog");
     }