diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 3aee82226e0..4aaba8ff16c 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -3245,7 +3245,7 @@ brw_wm_fs_emit(struct brw_context *brw,
    }
 
    const unsigned *assembly = NULL;
-   if (brw->gen >= 8) {
+   if (brw->gen >= 8 && getenv("GEN8") != NULL) {
       gen8_fs_generator g(brw, mem_ctx, key, prog_data, prog, fp, v.do_dual_src);
       assembly = g.generate_assembly(&v.instructions, simd16_instructions,
                                      final_assembly_size);
diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp
index 9a73f8fa1a6..8eae61d6e9e 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp
@@ -1794,7 +1794,7 @@ brw_vs_emit(struct brw_context *brw,
    }
 
    const unsigned *assembly = NULL;
-   if (brw->gen >= 8) {
+   if (brw->gen >= 8 && getenv("GEN8") != NULL) {
       gen8_vec4_generator g(brw, prog, &c->vp->program.Base, &prog_data->base,
                             mem_ctx, INTEL_DEBUG & DEBUG_VS);
       assembly = g.generate_assembly(&v.instructions, final_assembly_size);
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp
index 75ea9a265d5..313bdbe5067 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_gs_visitor.cpp
@@ -615,7 +615,7 @@ generate_assembly(struct brw_context *brw,
                   exec_list *instructions,
                   unsigned *final_assembly_size)
 {
-   if (brw->gen >= 8) {
+   if (brw->gen >= 8 && getenv("GEN8") != NULL) {
       gen8_vec4_generator g(brw, shader_prog, prog, prog_data, mem_ctx,
                             INTEL_DEBUG & DEBUG_GS);
       return g.generate_assembly(instructions, final_assembly_size);