diff --git a/gst/Makefile.am b/gst/Makefile.am
index 1f6cf06a55..7b113e948f 100644
--- a/gst/Makefile.am
+++ b/gst/Makefile.am
@@ -287,7 +287,8 @@ gir_sources=$(patsubst %,$(srcdir)/%, $(libgstreamer_@GST_API_VERSION@_la_SOURCE
 gir_sources+=$(patsubst %,$(builddir)/%, $(built_source_make))
 
 Gst-@GST_API_VERSION@.gir: $(INTROSPECTION_SCANNER) libgstreamer-@GST_API_VERSION@.la
-	$(AM_V_GEN)GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_UPDATE=no GI_SCANNER_DISABLE_CACHE=yes CC="$(CC)" \
+	$(AM_V_GEN)GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_UPDATE=no GI_SCANNER_DISABLE_CACHE=yes \
+		CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" CC="$(CC)" PKG_CONFIG="$(PKG_CONFIG)" DLLTOOL="$(DLLTOOL)" \
 		$(INTROSPECTION_SCANNER) -v --namespace Gst \
 		--nsversion=@GST_API_VERSION@ \
 		--verbose \
diff --git a/libs/gst/base/Makefile.am b/libs/gst/base/Makefile.am
index fd26842c7c..21fe561cc0 100644
--- a/libs/gst/base/Makefile.am
+++ b/libs/gst/base/Makefile.am
@@ -66,6 +66,7 @@ gir_sources=$(patsubst %,$(srcdir)/%, $(libgstbase_@GST_API_VERSION@_la_SOURCES)
 GstBase-@GST_API_VERSION@.gir: $(INTROSPECTION_SCANNER) libgstbase-@GST_API_VERSION@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" GI_SCANNER_DISABLE_CACHE=yes\
 		GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_UPDATE=no \
+		CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" CC="$(CC)" PKG_CONFIG="$(PKG_CONFIG)" DLLTOOL="$(DLLTOOL)" \
 		$(INTROSPECTION_SCANNER) -v --namespace GstBase \
 		--nsversion=@GST_API_VERSION@ \
 		--warn-all \
diff --git a/libs/gst/check/Makefile.am b/libs/gst/check/Makefile.am
index 62fcb78b6f..fd0d494c6c 100644
--- a/libs/gst/check/Makefile.am
+++ b/libs/gst/check/Makefile.am
@@ -222,6 +222,7 @@ gir_sources=$(patsubst %,$(srcdir)/%, $(libgstcheck_@GST_API_VERSION@_la_SOURCES
 GstCheck-@GST_API_VERSION@.gir: $(INTROSPECTION_SCANNER) libgstcheck-@GST_API_VERSION@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" GI_SCANNER_DISABLE_CACHE=yes\
 		GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_UPDATE=no \
+		CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" CC="$(CC)" PKG_CONFIG="$(PKG_CONFIG)" DLLTOOL="$(DLLTOOL)" \
 		$(INTROSPECTION_SCANNER) -v --namespace GstCheck \
 		--nsversion=@GST_API_VERSION@ \
 		--identifier-prefix=Gst \
diff --git a/libs/gst/controller/Makefile.am b/libs/gst/controller/Makefile.am
index ffc4afd207..5016ea62bf 100644
--- a/libs/gst/controller/Makefile.am
+++ b/libs/gst/controller/Makefile.am
@@ -38,6 +38,7 @@ gir_sources=$(patsubst %,$(srcdir)/%, $(libgstcontroller_@GST_API_VERSION@_la_SO
 GstController-@GST_API_VERSION@.gir: $(INTROSPECTION_SCANNER) libgstcontroller-@GST_API_VERSION@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" GI_SCANNER_DISABLE_CACHE=yes\
 		GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_UPDATE=no \
+		CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" CC="$(CC)" PKG_CONFIG="$(PKG_CONFIG)" DLLTOOL="$(DLLTOOL)" \
 		$(INTROSPECTION_SCANNER) -v --namespace GstController \
 		--nsversion=@GST_API_VERSION@ \
 		--warn-all \
diff --git a/libs/gst/net/Makefile.am b/libs/gst/net/Makefile.am
index 1fc581f15d..5d1b6a833c 100644
--- a/libs/gst/net/Makefile.am
+++ b/libs/gst/net/Makefile.am
@@ -57,6 +57,7 @@ gir_cincludes=--c-include="gst/net/net.h"
 GstNet-@GST_API_VERSION@.gir: $(INTROSPECTION_SCANNER) libgstnet-@GST_API_VERSION@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" GI_SCANNER_DISABLE_CACHE=yes\
 		GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_UPDATE=no \
+		CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" CC="$(CC)" PKG_CONFIG="$(PKG_CONFIG)" DLLTOOL="$(DLLTOOL)" \
 		$(INTROSPECTION_SCANNER) -v --namespace GstNet \
 		--identifier-prefix=Gst \
 		--symbol-prefix=gst \