diff --git a/srcpkgs/trackballs/patches/respect-our-cpp.patch b/srcpkgs/trackballs/patches/respect-our-cpp.patch
new file mode 100644
index 00000000000..c53441705d8
--- /dev/null
+++ b/srcpkgs/trackballs/patches/respect-our-cpp.patch
@@ -0,0 +1,13 @@
+Index: CMakeLists.txt
+===================================================================
+--- CMakeLists.txt.orig
++++ CMakeLists.txt
+@@ -66,7 +66,7 @@ endforeach()
+ 
+ # cpp is the c++ preprocessor
+ add_custom_command(OUTPUT guile.cc.x
+-                  COMMAND CPP=cpp; ${GUILE_SNARF} -o guile.cc.x ${PROJECT_SOURCE_DIR}/src/guile.cc ${defstr} ${incstr} -D_GNU_SOURCE=1 -D_REENTRANT
++                  COMMAND ${GUILE_SNARF} -o guile.cc.x ${PROJECT_SOURCE_DIR}/src/guile.cc ${defstr} ${incstr} -D_GNU_SOURCE=1 -D_REENTRANT
+                   DEPENDS src/guile.cc
+                   WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
+ 
diff --git a/srcpkgs/trackballs/template b/srcpkgs/trackballs/template
index 321e2007621..8e6989658a9 100644
--- a/srcpkgs/trackballs/template
+++ b/srcpkgs/trackballs/template
@@ -3,7 +3,7 @@ pkgname=trackballs
 version=1.3.1
 revision=2
 build_style=cmake
-hostmakedepends="gettext guile"
+hostmakedepends="gettext guile pkg-config"
 makedepends="zlib-devel SDL2_image-devel SDL2_mixer-devel SDL2_ttf-devel guile-devel"
 depends="guile"
 short_desc="Marble steering game"