diff --git a/ortools/sat/go/cpmodel/BUILD.bazel b/ortools/sat/go/cpmodel/BUILD.bazel
index 25b32f8db7..7a7e86aaff 100644
--- a/ortools/sat/go/cpmodel/BUILD.bazel
+++ b/ortools/sat/go/cpmodel/BUILD.bazel
@@ -18,8 +18,6 @@ go_library(
     srcs = [
         "cp_model.go",
         "cp_solver.go",
-        #"cp_solver_c.cc",
-        #"cp_solver_c.h",
         "domain.go",
     ],
     cdeps = [":cp_solver_c"],
diff --git a/ortools/sat/samples/BUILD.bazel b/ortools/sat/samples/BUILD.bazel
index 47f1ef0c75..14fed40823 100644
--- a/ortools/sat/samples/BUILD.bazel
+++ b/ortools/sat/samples/BUILD.bazel
@@ -11,7 +11,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-load(":code_samples.bzl", "code_sample_cc_py", "code_sample_java", "code_sample_py")
+load(":code_samples.bzl",
+     "code_sample_cc_go_py", "code_sample_cc_py",
+     "code_sample_go", "code_sample_java", "code_sample_py")
 
 code_sample_py(name = "all_different_except_zero_sample_sat")
 
@@ -23,19 +25,20 @@ code_sample_cc_py(name = "assignment_task_sizes_sat")
 
 code_sample_cc_py(name = "assignment_teams_sat")
 
-code_sample_cc_py(name = "assumptions_sample_sat")
+code_sample_cc_go_py(name = "assumptions_sample_sat")
 
-code_sample_cc_py(name = "binpacking_problem_sat")
+code_sample_cc_go_py(name = "binpacking_problem_sat")
 
 code_sample_py(name = "bin_packing_sat")
 
 code_sample_py(name = "bool_and_int_var_product_sample_sat")
 
-code_sample_cc_py(name = "bool_or_sample_sat")
+code_sample_cc_go_py(name = "bool_or_sample_sat")
 
+code_sample_go(name = "boolean_product_sample_sat")
 code_sample_py(name = "boolean_product_sample_sat")
 
-code_sample_cc_py(name = "channeling_sample_sat")
+code_sample_cc_go_py(name = "channeling_sample_sat")
 
 code_sample_cc_py(name = "clone_model_sample_sat")
 
@@ -45,55 +48,55 @@ code_sample_cc_py(name = "cp_sat_example")
 
 code_sample_py(name = "cumulative_variable_profile_sample_sat")
 
-code_sample_cc_py(name = "earliness_tardiness_cost_sample_sat")
+code_sample_cc_go_py(name = "earliness_tardiness_cost_sample_sat")
 
 code_sample_py(name = "index_first_boolvar_true_sample_sat")
 
 code_sample_py(name = "interval_relations_sample_sat")
 
-code_sample_cc_py(name = "interval_sample_sat")
+code_sample_cc_go_py(name = "interval_sample_sat")
 
 code_sample_cc_py(name = "minimal_jobshop_sat")
 
-code_sample_cc_py(name = "literal_sample_sat")
+code_sample_cc_go_py(name = "literal_sample_sat")
 
 code_sample_cc_py(name = "multiple_knapsack_sat")
 
 code_sample_cc_py(name = "non_linear_sat")
 
-code_sample_cc_py(name = "nqueens_sat")
+code_sample_cc_go_py(name = "no_overlap_sample_sat")
 
-code_sample_cc_py(name = "nurses_sat")
+code_sample_cc_go_py(name = "nqueens_sat")
 
-code_sample_cc_py(name = "optional_interval_sample_sat")
+code_sample_cc_go_py(name = "nurses_sat")
 
-code_sample_cc_py(name = "no_overlap_sample_sat")
+code_sample_cc_go_py(name = "optional_interval_sample_sat")
 
 code_sample_py(name = "overlapping_intervals_sample_sat")
 
-code_sample_cc_py(name = "rabbits_and_pheasants_sat")
+code_sample_cc_go_py(name = "rabbits_and_pheasants_sat")
 
 code_sample_py(name = "ranking_circuit_sample_sat")
 
-code_sample_cc_py(name = "ranking_sample_sat")
+code_sample_cc_go_py(name = "ranking_sample_sat")
 
-code_sample_cc_py(name = "reified_sample_sat")
+code_sample_cc_go_py(name = "reified_sample_sat")
 
 code_sample_cc_py(name = "schedule_requests_sat")
 
 code_sample_py(name = "scheduling_with_calendar_sample_sat")
 
-code_sample_cc_py(name = "simple_sat_program")
+code_sample_cc_go_py(name = "search_for_all_solutions_sample_sat")
 
-code_sample_cc_py(name = "search_for_all_solutions_sample_sat")
+code_sample_cc_go_py(name = "simple_sat_program")
 
-code_sample_cc_py(name = "solution_hinting_sample_sat")
+code_sample_cc_go_py(name = "solution_hinting_sample_sat")
 
-code_sample_cc_py(name = "solve_and_print_intermediate_solutions_sample_sat")
+code_sample_cc_go_py(name = "solve_and_print_intermediate_solutions_sample_sat")
 
-code_sample_cc_py(name = "step_function_sample_sat")
+code_sample_cc_go_py(name = "solve_with_time_limit_sample_sat")
 
-code_sample_cc_py(name = "solve_with_time_limit_sample_sat")
+code_sample_cc_go_py(name = "step_function_sample_sat")
 
 code_sample_cc_py(name = "stop_after_n_solutions_sample_sat")
 
diff --git a/ortools/sat/samples/assumptions_sample_sat.go b/ortools/sat/samples/assumptions_sample_sat.go
index c46d994a91..c8b291b688 100644
--- a/ortools/sat/samples/assumptions_sample_sat.go
+++ b/ortools/sat/samples/assumptions_sample_sat.go
@@ -18,8 +18,8 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
-	"ortools/sat/go/cpmodel"
 )
 
 func assumptionsSampleSat() error {
diff --git a/ortools/sat/samples/binpacking_problem_sat.go b/ortools/sat/samples/binpacking_problem_sat.go
index 96c1251cd4..972d7a6d6c 100644
--- a/ortools/sat/samples/binpacking_problem_sat.go
+++ b/ortools/sat/samples/binpacking_problem_sat.go
@@ -19,7 +19,7 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
-	"ortools/sat/go/cpmodel"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 )
 
 const (
diff --git a/ortools/sat/samples/bool_or_sample_sat.go b/ortools/sat/samples/bool_or_sample_sat.go
index 0af18fde13..14ef894e98 100644
--- a/ortools/sat/samples/bool_or_sample_sat.go
+++ b/ortools/sat/samples/bool_or_sample_sat.go
@@ -15,7 +15,7 @@
 package main
 
 import (
-	"ortools/sat/go/cpmodel"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 )
 
 func boolOrSampleSat() {
diff --git a/ortools/sat/samples/boolean_product_sample_sat.go b/ortools/sat/samples/boolean_product_sample_sat.go
index 8d724195c7..d79ae52d8b 100644
--- a/ortools/sat/samples/boolean_product_sample_sat.go
+++ b/ortools/sat/samples/boolean_product_sample_sat.go
@@ -18,9 +18,9 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	sppb "github.com/google/or-tools/ortools/sat/proto/satparameters"
 	"google.golang.org/protobuf/proto"
-	"ortools/sat/go/cpmodel"
 )
 
 func booleanProductSample() error {
@@ -44,11 +44,11 @@ func booleanProductSample() error {
 	}
 	// Set `fill_additional_solutions_in_response` and `enumerate_all_solutions` to true so
 	// the solver returns all solutions found.
-	params := sppb.SatParameters_builder{
+	params := &sppb.SatParameters{
 		FillAdditionalSolutionsInResponse: proto.Bool(true),
 		EnumerateAllSolutions:             proto.Bool(true),
 		SolutionPoolSize:                  proto.Int32(4),
-	}.Build()
+	}
 	response, err := cpmodel.SolveCpModelWithParameters(m, params)
 	if err != nil {
 		return fmt.Errorf("failed to solve the model: %w", err)
diff --git a/ortools/sat/samples/channeling_sample_sat.go b/ortools/sat/samples/channeling_sample_sat.go
index dab99823e6..33d3d52df2 100644
--- a/ortools/sat/samples/channeling_sample_sat.go
+++ b/ortools/sat/samples/channeling_sample_sat.go
@@ -18,10 +18,10 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
 	sppb "github.com/google/or-tools/ortools/sat/proto/satparameters"
 	"google.golang.org/protobuf/proto"
-	"ortools/sat/go/cpmodel"
 )
 
 func channelingSampleSat() error {
@@ -53,12 +53,12 @@ func channelingSampleSat() error {
 	if err != nil {
 		return fmt.Errorf("failed to instantiate the CP model: %w", err)
 	}
-	params := sppb.SatParameters_builder{
+	params := &sppb.SatParameters{
 		FillAdditionalSolutionsInResponse: proto.Bool(true),
 		EnumerateAllSolutions:             proto.Bool(true),
 		SolutionPoolSize:                  proto.Int32(11),
 		SearchBranching:                   sppb.SatParameters_FIXED_SEARCH.Enum(),
-	}.Build()
+	}
 	response, err := cpmodel.SolveCpModelWithParameters(m, params)
 	if err != nil {
 		return fmt.Errorf("failed to solve the model: %w", err)
diff --git a/ortools/sat/samples/code_samples.bzl b/ortools/sat/samples/code_samples.bzl
index 92f9ebde9d..7f7f0ece59 100644
--- a/ortools/sat/samples/code_samples.bzl
+++ b/ortools/sat/samples/code_samples.bzl
@@ -13,11 +13,13 @@
 
 """Helper macro to compile and test code samples."""
 
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_test")
 load("@pip_deps//:requirements.bzl", "requirement")
+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_test")
 load("@rules_python//python:defs.bzl", "py_binary", "py_test")
 
 def code_sample_cc(name):
-    native.cc_binary(
+    cc_binary(
         name = name + "_cc",
         srcs = [name + ".cc"],
         deps = [
@@ -28,7 +30,7 @@ def code_sample_cc(name):
         ],
     )
 
-    native.cc_test(
+    cc_test(
         name = name + "_cc_test",
         size = "small",
         srcs = [name + ".cc"],
@@ -41,6 +43,20 @@ def code_sample_cc(name):
         ],
     )
 
+def code_sample_go(name):
+    go_test(
+        name = name + "_go_test",
+        size = "small",
+        srcs = [name + ".go"],
+        deps = [
+          "//ortools/sat:cp_model_go_proto",
+          "//ortools/sat:sat_parameters_go_proto",
+          "//ortools/sat/go/cpmodel",
+          "@com_github_golang_glog//:glog",
+          "@org_golang_google_protobuf//proto",
+        ],
+    )
+
 def code_sample_py(name):
     py_binary(
         name = name + "_py3",
@@ -74,6 +90,11 @@ def code_sample_py(name):
         srcs_version = "PY3",
     )
 
+def code_sample_cc_go_py(name):
+    code_sample_cc(name = name)
+    code_sample_go(name = name)
+    code_sample_py(name = name)
+
 def code_sample_cc_py(name):
     code_sample_cc(name = name)
     code_sample_py(name = name)
diff --git a/ortools/sat/samples/earliness_tardiness_cost_sample_sat.go b/ortools/sat/samples/earliness_tardiness_cost_sample_sat.go
index ce4135506c..c8bdab2b25 100644
--- a/ortools/sat/samples/earliness_tardiness_cost_sample_sat.go
+++ b/ortools/sat/samples/earliness_tardiness_cost_sample_sat.go
@@ -19,10 +19,10 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
 	sppb "github.com/google/or-tools/ortools/sat/proto/satparameters"
 	"google.golang.org/protobuf/proto"
-	"ortools/sat/go/cpmodel"
 )
 
 const (
@@ -62,12 +62,12 @@ func earlinessTardinessCostSampleSat() error {
 	if err != nil {
 		return fmt.Errorf("failed to instantiate the CP model: %w", err)
 	}
-	params := sppb.SatParameters_builder{
+	params := &sppb.SatParameters{
 		FillAdditionalSolutionsInResponse: proto.Bool(true),
 		EnumerateAllSolutions:             proto.Bool(true),
 		SolutionPoolSize:                  proto.Int32(21),
 		SearchBranching:                   sppb.SatParameters_FIXED_SEARCH.Enum(),
-	}.Build()
+	}
 	response, err := cpmodel.SolveCpModelWithParameters(m, params)
 	if err != nil {
 		return fmt.Errorf("failed to solve the model: %w", err)
diff --git a/ortools/sat/samples/interval_sample_sat.go b/ortools/sat/samples/interval_sample_sat.go
index 5a3a254591..24d89f677b 100644
--- a/ortools/sat/samples/interval_sample_sat.go
+++ b/ortools/sat/samples/interval_sample_sat.go
@@ -18,7 +18,7 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
-	"ortools/sat/go/cpmodel"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 )
 
 const horizon = 100
diff --git a/ortools/sat/samples/literal_sample_sat.go b/ortools/sat/samples/literal_sample_sat.go
index 7cfec06ccb..6018b1911e 100644
--- a/ortools/sat/samples/literal_sample_sat.go
+++ b/ortools/sat/samples/literal_sample_sat.go
@@ -16,7 +16,7 @@ package main
 
 import (
 	log "github.com/golang/glog"
-	"ortools/sat/go/cpmodel"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 )
 
 func literalSampleSat() {
diff --git a/ortools/sat/samples/no_overlap_sample_sat.go b/ortools/sat/samples/no_overlap_sample_sat.go
index e69fc2a0cc..cbe175f404 100644
--- a/ortools/sat/samples/no_overlap_sample_sat.go
+++ b/ortools/sat/samples/no_overlap_sample_sat.go
@@ -18,8 +18,8 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
-	"ortools/sat/go/cpmodel"
 )
 
 const horizon = 21 // 3 weeks
diff --git a/ortools/sat/samples/nqueens_sat.go b/ortools/sat/samples/nqueens_sat.go
index 198237f6bd..5694bfd7ea 100644
--- a/ortools/sat/samples/nqueens_sat.go
+++ b/ortools/sat/samples/nqueens_sat.go
@@ -18,7 +18,7 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
-	"ortools/sat/go/cpmodel"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 )
 
 const boardSize = 8
diff --git a/ortools/sat/samples/nurses_sat.go b/ortools/sat/samples/nurses_sat.go
index c8fbb49284..8b1df4aa33 100644
--- a/ortools/sat/samples/nurses_sat.go
+++ b/ortools/sat/samples/nurses_sat.go
@@ -18,7 +18,7 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
-	"ortools/sat/go/cpmodel"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 )
 
 const (
diff --git a/ortools/sat/samples/optional_interval_sample_sat.go b/ortools/sat/samples/optional_interval_sample_sat.go
index 2f50f8a411..1dffb2d88e 100644
--- a/ortools/sat/samples/optional_interval_sample_sat.go
+++ b/ortools/sat/samples/optional_interval_sample_sat.go
@@ -19,7 +19,7 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
-	"ortools/sat/go/cpmodel"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 )
 
 const horizon = 100
diff --git a/ortools/sat/samples/rabbits_and_pheasants_sat.go b/ortools/sat/samples/rabbits_and_pheasants_sat.go
index c828874a16..a49d688e10 100644
--- a/ortools/sat/samples/rabbits_and_pheasants_sat.go
+++ b/ortools/sat/samples/rabbits_and_pheasants_sat.go
@@ -19,8 +19,8 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
-	"ortools/sat/go/cpmodel"
 )
 
 const numAnimals = 20
diff --git a/ortools/sat/samples/ranking_sample_sat.go b/ortools/sat/samples/ranking_sample_sat.go
index d81c01e1fd..a4bf692340 100644
--- a/ortools/sat/samples/ranking_sample_sat.go
+++ b/ortools/sat/samples/ranking_sample_sat.go
@@ -18,8 +18,8 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
-	"ortools/sat/go/cpmodel"
 )
 
 const (
diff --git a/ortools/sat/samples/reified_sample_sat.go b/ortools/sat/samples/reified_sample_sat.go
index 63a77dba72..00ecb4313e 100644
--- a/ortools/sat/samples/reified_sample_sat.go
+++ b/ortools/sat/samples/reified_sample_sat.go
@@ -15,7 +15,7 @@
 package main
 
 import (
-	"ortools/sat/go/cpmodel"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 )
 
 func reifiedSampleSat() {
diff --git a/ortools/sat/samples/search_for_all_solutions_sample_sat.go b/ortools/sat/samples/search_for_all_solutions_sample_sat.go
index 2324f031de..6e43abbe65 100644
--- a/ortools/sat/samples/search_for_all_solutions_sample_sat.go
+++ b/ortools/sat/samples/search_for_all_solutions_sample_sat.go
@@ -19,9 +19,9 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	sppb "github.com/google/or-tools/ortools/sat/proto/satparameters"
 	"google.golang.org/protobuf/proto"
-	"ortools/sat/go/cpmodel"
 )
 
 func searchForAllSolutionsSampleSat() error {
@@ -41,11 +41,11 @@ func searchForAllSolutionsSampleSat() error {
 	// Currently, the CpModelBuilder does not allow for callbacks, so each feasible solution cannot
 	// be printed while solving. However, the CP Solver can return all of the enumerated solutions
 	// in the response by setting the following parameters.
-	params := sppb.SatParameters_builder{
+	params := &sppb.SatParameters{
 		EnumerateAllSolutions:             proto.Bool(true),
 		FillAdditionalSolutionsInResponse: proto.Bool(true),
 		SolutionPoolSize:                  proto.Int32(27),
-	}.Build()
+	}
 	response, err := cpmodel.SolveCpModelWithParameters(m, params)
 	if err != nil {
 		return fmt.Errorf("failed to solve the model: %w", err)
diff --git a/ortools/sat/samples/simple_sat_program.go b/ortools/sat/samples/simple_sat_program.go
index cf48a94284..8cddcb7efe 100644
--- a/ortools/sat/samples/simple_sat_program.go
+++ b/ortools/sat/samples/simple_sat_program.go
@@ -18,8 +18,8 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
-	"ortools/sat/go/cpmodel"
 )
 
 func simpleSatProgram() error {
diff --git a/ortools/sat/samples/solution_hinting_sample_sat.go b/ortools/sat/samples/solution_hinting_sample_sat.go
index 70f15710c9..d0d4379fe8 100644
--- a/ortools/sat/samples/solution_hinting_sample_sat.go
+++ b/ortools/sat/samples/solution_hinting_sample_sat.go
@@ -18,8 +18,8 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
-	"ortools/sat/go/cpmodel"
 )
 
 func solutionHintingSampleSat() error {
diff --git a/ortools/sat/samples/solve_and_print_intermediate_solutions_sample_sat.go b/ortools/sat/samples/solve_and_print_intermediate_solutions_sample_sat.go
index 7885073bac..5ed02d38bc 100644
--- a/ortools/sat/samples/solve_and_print_intermediate_solutions_sample_sat.go
+++ b/ortools/sat/samples/solve_and_print_intermediate_solutions_sample_sat.go
@@ -18,9 +18,9 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	sppb "github.com/google/or-tools/ortools/sat/proto/satparameters"
 	"google.golang.org/protobuf/proto"
-	"ortools/sat/go/cpmodel"
 )
 
 func solveAndPrintIntermediateSolutionsSampleSat() error {
@@ -44,10 +44,10 @@ func solveAndPrintIntermediateSolutionsSampleSat() error {
 	// Currently, the CpModelBuilder does not allow for callbacks, so intermediate solutions
 	// cannot be printed while solving. However, the CP-SAT solver does allow for returning
 	// the intermediate solutions found while solving in the response.
-	params := sppb.SatParameters_builder{
+	params := &sppb.SatParameters{
 		FillAdditionalSolutionsInResponse: proto.Bool(true),
 		SolutionPoolSize:                  proto.Int32(10),
-	}.Build()
+	}
 	response, err := cpmodel.SolveCpModelWithParameters(m, params)
 	if err != nil {
 		return fmt.Errorf("failed to solve the model: %w", err)
diff --git a/ortools/sat/samples/solve_with_time_limit_sample_sat.go b/ortools/sat/samples/solve_with_time_limit_sample_sat.go
index b7f968b336..5a5bd6cb1b 100644
--- a/ortools/sat/samples/solve_with_time_limit_sample_sat.go
+++ b/ortools/sat/samples/solve_with_time_limit_sample_sat.go
@@ -18,10 +18,10 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
 	sppb "github.com/google/or-tools/ortools/sat/proto/satparameters"
 	"google.golang.org/protobuf/proto"
-	"ortools/sat/go/cpmodel"
 )
 
 func solveWithTimeLimitSampleSat() error {
@@ -40,9 +40,9 @@ func solveWithTimeLimitSampleSat() error {
 	}
 
 	// Sets a time limit of 10 seconds.
-	params := sppb.SatParameters_builder{
+	params := &sppb.SatParameters{
 		MaxTimeInSeconds: proto.Float64(10.0),
-	}.Build()
+	}
 
 	// Solve.
 	response, err := cpmodel.SolveCpModelWithParameters(m, params)
diff --git a/ortools/sat/samples/step_function_sample_sat.go b/ortools/sat/samples/step_function_sample_sat.go
index b04a04d9ac..8c927f1e75 100644
--- a/ortools/sat/samples/step_function_sample_sat.go
+++ b/ortools/sat/samples/step_function_sample_sat.go
@@ -18,10 +18,10 @@ import (
 	"fmt"
 
 	log "github.com/golang/glog"
+	"github.com/google/or-tools/ortools/sat/go/cpmodel"
 	cmpb "github.com/google/or-tools/ortools/sat/proto/cpmodel"
 	sppb "github.com/google/or-tools/ortools/sat/proto/satparameters"
 	"google.golang.org/protobuf/proto"
-	"ortools/sat/go/cpmodel"
 )
 
 func stepFunctionSampleSat() error {
@@ -71,12 +71,12 @@ func stepFunctionSampleSat() error {
 	if err != nil {
 		return fmt.Errorf("failed to instantiate the CP model: %w", err)
 	}
-	params := sppb.SatParameters_builder{
+	params := &sppb.SatParameters{
 		FillAdditionalSolutionsInResponse: proto.Bool(true),
 		EnumerateAllSolutions:             proto.Bool(true),
 		SolutionPoolSize:                  proto.Int32(21),
 		SearchBranching:                   sppb.SatParameters_FIXED_SEARCH.Enum(),
-	}.Build()
+	}
 	response, err := cpmodel.SolveCpModelWithParameters(m, params)
 	if err != nil {
 		return fmt.Errorf("failed to solve the model: %w", err)