diff --git a/easybuild/easyconfigs/q/Qt5/Qt5-5.10.1-foss-2018a.eb b/easybuild/easyconfigs/q/Qt5/Qt5-5.10.1-foss-2018a.eb
index 19b8d4c28df5..5950df517b28 100644
--- a/easybuild/easyconfigs/q/Qt5/Qt5-5.10.1-foss-2018a.eb
+++ b/easybuild/easyconfigs/q/Qt5/Qt5-5.10.1-foss-2018a.eb
@@ -15,7 +15,12 @@ source_urls = [
 sources = ['qt-everywhere-src-%(version)s.tar.xz']
 checksums = ['05ffba7b811b854ed558abf2be2ddbd3bb6ddd0b60ea4b5da75d277ac15e740a']
 
-builddependencies = [('pkg-config', '0.29.2')]
+builddependencies = [
+    ('pkg-config', '0.29.2'),
+    ('Bison', '3.0.4'),
+    ('flex', '2.6.4'),
+    ('Python', '2.7.14'),
+]
 
 dependencies = [
     ('GLib', '2.54.3'),
diff --git a/easybuild/easyconfigs/q/Qt5/Qt5-5.10.1-foss-2018b.eb b/easybuild/easyconfigs/q/Qt5/Qt5-5.10.1-foss-2018b.eb
index 906a93b1a57a..62643c6cc4ba 100644
--- a/easybuild/easyconfigs/q/Qt5/Qt5-5.10.1-foss-2018b.eb
+++ b/easybuild/easyconfigs/q/Qt5/Qt5-5.10.1-foss-2018b.eb
@@ -15,7 +15,12 @@ source_urls = [
 sources = ['qt-everywhere-src-%(version)s.tar.xz']
 checksums = ['05ffba7b811b854ed558abf2be2ddbd3bb6ddd0b60ea4b5da75d277ac15e740a']
 
-builddependencies = [('pkg-config', '0.29.2')]
+builddependencies = [
+    ('pkg-config', '0.29.2'),
+    ('Bison', '3.0.4'),
+    ('flex', '2.6.4'),
+    ('Python', '2.7.15'),
+]
 
 dependencies = [
     ('GLib', '2.54.3'),
diff --git a/easybuild/easyconfigs/q/Qt5/Qt5-5.11.2-foss-2018b.eb b/easybuild/easyconfigs/q/Qt5/Qt5-5.11.2-foss-2018b.eb
index a6c3eb137418..647d90db071d 100644
--- a/easybuild/easyconfigs/q/Qt5/Qt5-5.11.2-foss-2018b.eb
+++ b/easybuild/easyconfigs/q/Qt5/Qt5-5.11.2-foss-2018b.eb
@@ -15,7 +15,12 @@ source_urls = [
 sources = ['qt-everywhere-src-%(version)s.tar.xz']
 checksums = ['c6104b840b6caee596fa9a35bc5f57f67ed5a99d6a36497b6fe66f990a53ca81']
 
-builddependencies = [('pkg-config', '0.29.2')]
+builddependencies = [
+    ('pkg-config', '0.29.2'),
+    ('Bison', '3.0.4'),
+    ('flex', '2.6.4'),
+    ('Python', '2.7.15'),
+]
 
 dependencies = [
     ('GLib', '2.54.3'),