diff --git a/Extras/AlternativeCollisionAlgorithms/Jamfile b/Extras/AlternativeCollisionAlgorithms/Jamfile
index f32ca1ad1..074f1017b 100644
--- a/Extras/AlternativeCollisionAlgorithms/Jamfile
+++ b/Extras/AlternativeCollisionAlgorithms/Jamfile
@@ -1,7 +1,7 @@
 SubDir TOP Extras AlternativeCollisionAlgorithms ;
 
 
-Library boxbox : [ Wildcard *.h *.cpp ] ;
+Library boxbox : [ Wildcard *.h *.cpp ] : noinstall ;
 #internal header path to compile boxbox
 CFlags boxbox : [ FIncludes $(TOP)/Extras/AlternativeCollisionAlgorithms ] ;
 
diff --git a/Extras/COLLADA_DOM/Jamfile b/Extras/COLLADA_DOM/Jamfile
index d532a70d3..6d3afbd5f 100644
--- a/Extras/COLLADA_DOM/Jamfile
+++ b/Extras/COLLADA_DOM/Jamfile
@@ -11,7 +11,7 @@ Library colladadom :
 	[ Wildcard src/modules/LIBXMLPlugin : *.h *.cpp ]
 	[ Wildcard src/modules/stdErrPlugin : *.h *.cpp ]
 	[ Wildcard src/modules/STLDatabase : *.h *.cpp ]
-
+: noinstall
 
  ;
 
diff --git a/Extras/ConvexDecomposition/Jamfile b/Extras/ConvexDecomposition/Jamfile
index 602e3697f..2bf711f06 100644
--- a/Extras/ConvexDecomposition/Jamfile
+++ b/Extras/ConvexDecomposition/Jamfile
@@ -1,7 +1,6 @@
 SubDir TOP Extras ConvexDecomposition ;
 
-
-Library convexdecomposition : [ Wildcard *.h *.cpp ] ;
+Library convexdecomposition : [ Wildcard *.h *.cpp ] : noinstall  ;
 
 CFlags convexdecomposition : [ FIncludes $(TOP)/Extras/Decomposition ] ;
 
diff --git a/Extras/GIMPACT/Jamfile b/Extras/GIMPACT/Jamfile
index 08914a857..83db3f334 100644
--- a/Extras/GIMPACT/Jamfile
+++ b/Extras/GIMPACT/Jamfile
@@ -2,7 +2,7 @@ SubDir TOP Extras GIMPACT ;
 
 #IncludeDir Extras/GIMPACT/include ;
 
-Library GIMPACT : [ Wildcard src : */.h *.cpp ] ;
+Library GIMPACT : [ Wildcard src : */.h *.cpp ] : noinstall ;
 CFlags GIMPACT : [ FIncludes $(TOP)/Extras/GIMPACT/include ] ;
 LibDepends GIMPACT :  ;
 
diff --git a/Extras/GIMPACTBullet/Jamfile b/Extras/GIMPACTBullet/Jamfile
index 01c32ea73..7ae24b9ea 100644
--- a/Extras/GIMPACTBullet/Jamfile
+++ b/Extras/GIMPACTBullet/Jamfile
@@ -1,7 +1,7 @@
 SubDir TOP Extras GIMPACTBullet ;
 
 
-Library GIMPACTBullet : [ Wildcard *.h *.cpp ] ;
+Library GIMPACTBullet : [ Wildcard *.h *.cpp ] : noinstall  ;
 CFlags GIMPACTBullet : [ FIncludes $(TOP)/Extras/GIMPACTBullet $(TOP)/Extras/GIMPACT/include ] ;
 LibDepends GIMPACTBullet : GIMPACT  ;
 
diff --git a/Extras/LibXML/Jamfile b/Extras/LibXML/Jamfile
index e2f587239..b4ee3e743 100644
--- a/Extras/LibXML/Jamfile
+++ b/Extras/LibXML/Jamfile
@@ -1,7 +1,7 @@
 SubDir TOP Extras LibXML ;
 
 
-Library libxml : [ Wildcard *.h *.c ] ;
+Library libxml : [ Wildcard *.h *.c ] : noinstall ;
 
 CFlags libxml : 
 [ FIncludes $(TOP)/Extras/LibXML ]
diff --git a/Extras/quickstep/Jamfile b/Extras/quickstep/Jamfile
index e3eb83621..f9af3bef1 100644
--- a/Extras/quickstep/Jamfile
+++ b/Extras/quickstep/Jamfile
@@ -3,7 +3,7 @@ SubDir TOP Extras quickstep ;
 #this is a bad global
 #IncludeDir Extras/quickstep ;
 
-Library quickstep : [ Wildcard *.h *.cpp ] ;
+Library quickstep : [ Wildcard *.h *.cpp ] : noinstall ;
 #internal header path to compile quickstep
 CFlags quickstep : [ FIncludes $(TOP)/Extras/quickstep ] ;