diff --git a/ext/curia/extconf.rb b/ext/curia/extconf.rb
index 570235f..51d408b 100644
--- a/ext/curia/extconf.rb
+++ b/ext/curia/extconf.rb
@@ -3,9 +3,9 @@
 dir_config("curia")
 
 home = ENV['HOME']
-$CFLAGS = "-I. -I../.. -I#{home}/include -I/usr/local/include"
-$LDFLAGS = "-L../.. -L#{home}/lib -L/usr/local/lib"
-$LIBS = "-L../.. -L#{home}/lib -L/usr/local/lib"
+$CFLAGS = "-I. -I#{home}/include -I/usr/local/include " + `pkg-config qdbm --cflags`.chomp
+$LDFLAGS = "-L#{home}/lib -L/usr/local/lib " + `pkg-config qdbm --libs`.chomp
+$LIBS = "-L#{home}/lib -L/usr/local/lib " + `pkg-config qdbm --libs`.chomp
 
 have_library("c", "main")
 have_library("pthread", "main")
diff --git a/ext/depot/extconf.rb b/ext/depot/extconf.rb
index dff5f6e..2219095 100644
--- a/ext/depot/extconf.rb
+++ b/ext/depot/extconf.rb
@@ -3,9 +3,9 @@
 dir_config("depot")
 
 home = ENV['HOME']
-$CFLAGS = "-I. -I../.. -I#{home}/include -I/usr/local/include"
-$LDFLAGS = "-L../.. -L#{home}/lib -L/usr/local/lib"
-$LIBS = "-L../.. -L#{home}/lib -L/usr/local/lib"
+$CFLAGS = "-I. -I#{home}/include -I/usr/local/include " + `pkg-config qdbm --cflags`.chomp
+$LDFLAGS = "-L#{home}/lib -L/usr/local/lib " + `pkg-config qdbm --libs`.chomp
+$LIBS = "-L#{home}/lib -L/usr/local/lib " + `pkg-config qdbm --libs`.chomp
 
 have_library("c", "main")
 have_library("pthread", "main")
diff --git a/ext/villa/extconf.rb b/ext/villa/extconf.rb
index 3e8d1d4..842cefa 100644
--- a/ext/villa/extconf.rb
+++ b/ext/villa/extconf.rb
@@ -3,9 +3,9 @@
 dir_config("villa")
 
 home = ENV['HOME']
-$CFLAGS = "-I. -I../.. -I#{home}/include -I/usr/local/include"
-$LDFLAGS = "-L../.. -L#{home}/lib -L/usr/local/lib"
-$LIBS = "-L../.. -L#{home}/lib -L/usr/local/lib"
+$CFLAGS = "-I. -I#{home}/include -I/usr/local/include " + `pkg-config qdbm --cflags`.chomp
+$LDFLAGS = "-L#{home}/lib -L/usr/local/lib " + `pkg-config qdbm --libs`.chomp
+$LIBS = "-L#{home}/lib -L/usr/local/lib " + `pkg-config qdbm --libs`.chomp
 
 have_library("c", "main")
 have_library("pthread", "main")