diff --git a/build_tests/tasks/tasks.rb b/build_tests/tasks/tasks.rb
new file mode 100644
index 0000000..c49ccea
--- /dev/null
+++ b/build_tests/tasks/tasks.rb
@@ -0,0 +1,20 @@
+task "one" do
+  puts "one"
+end
+
+task "two", deps: ["one", "three"] do
+  puts "two"
+end
+
+task "three", desc: "Task three" do
+  puts "three"
+end
+
+task "four", desc: "Task four", params: [
+  param("myparam", "defaultvalue", true, "My special parameter"),
+  param("myp2", nil, false, "My parameter 2"),
+] do |task, params|
+  puts "four"
+  puts "myparam:" + params["myparam"].inspect
+  puts "myp2:" + params["myp2"].inspect
+end
diff --git a/lib/rscons/cli.rb b/lib/rscons/cli.rb
index 21b4de1..b347bb7 100644
--- a/lib/rscons/cli.rb
+++ b/lib/rscons/cli.rb
@@ -31,7 +31,7 @@ module Rscons
       while argv.size > 0
         if argv[0].start_with?("-")
           valid_arg = false
-          if argv[0] =~ /^--(\S+?)(?:=(.*))$/
+          if argv[0] =~ /^--(\S+?)(?:=(.*))?$/
             param_name, value = $1, $2
             if param = Task[task].params[param_name]
               param.value = value || argv[0]
diff --git a/lib/rscons/script.rb b/lib/rscons/script.rb
index dc828e7..055d030 100644
--- a/lib/rscons/script.rb
+++ b/lib/rscons/script.rb
@@ -339,8 +339,11 @@ module Rscons
     # Perform configure action.
     def configure(configure_op)
       cdsl = ConfigureDsl.new(self, configure_op)
-      Task["configure"].actions.each do |action|
-        cdsl.instance_eval(&action)
+      configure_task = Task["configure"]
+      configure_task.actions.each do |action|
+        cdsl.instance_eval do
+          action[configure_task, configure_task.param_values]
+        end
       end
     end
 
diff --git a/lib/rscons/task.rb b/lib/rscons/task.rb
index aa70f0a..6d34833 100644
--- a/lib/rscons/task.rb
+++ b/lib/rscons/task.rb
@@ -146,7 +146,7 @@ module Rscons
         Rscons.application.configure
       else
         @actions.each do |action|
-          action[]
+          action[self, param_values]
         end
       end
     end
@@ -200,6 +200,18 @@ module Rscons
       end
     end
 
+    # Get parameter values as a Hash.
+    #
+    # @return [Hash]
+    #   Parameter values.
+    def param_values
+      param_values = {}
+      @params.each do |name, param|
+        param_values[name] = param.value
+      end
+      param_values
+    end
+
   end
 
 end
diff --git a/spec/build_tests_spec.rb b/spec/build_tests_spec.rb
index 5b59040..6aef8fe 100644
--- a/spec/build_tests_spec.rb
+++ b/spec/build_tests_spec.rb
@@ -2841,4 +2841,64 @@ EOF
     end
   end
 
+  it "executes the requested tasks in the requested order" do
+    test_dir "tasks"
+    result = run_rscons(args: %w[-f tasks.rb configure])
+    result = run_rscons(args: %w[-f tasks.rb one three])
+    expect(result.stderr).to eq ""
+    expect(result.status).to eq 0
+    expect(result.stdout).to eq "one\nthree\n"
+    result = run_rscons(args: %w[-f tasks.rb three one])
+    expect(result.stderr).to eq ""
+    expect(result.status).to eq 0
+    expect(result.stdout).to eq "three\none\n"
+  end
+
+  it "executes the task's dependencies before the requested task" do
+    test_dir "tasks"
+    result = run_rscons(args: %w[-f tasks.rb configure])
+    result = run_rscons(args: %w[-f tasks.rb two])
+    expect(result.stderr).to eq ""
+    expect(result.status).to eq 0
+    expect(result.stdout).to eq "one\nthree\ntwo\n"
+  end
+
+  it "does not execute a task more than once" do
+    test_dir "tasks"
+    result = run_rscons(args: %w[-f tasks.rb configure])
+    result = run_rscons(args: %w[-f tasks.rb one two three])
+    expect(result.stderr).to eq ""
+    expect(result.status).to eq 0
+    expect(result.stdout).to eq "one\nthree\ntwo\n"
+  end
+
+  it "passes task arguments" do
+    test_dir "tasks"
+    result = run_rscons(args: %w[-f tasks.rb configure])
+    result = run_rscons(args: %w[-f tasks.rb four])
+    expect(result.stderr).to eq ""
+    expect(result.status).to eq 0
+    expect(result.stdout).to eq %[four\nmyparam:"defaultvalue"\nmyp2:nil\n]
+    result = run_rscons(args: %w[-f tasks.rb four --myparam=cli-value --myp2 one])
+    expect(result.stderr).to eq ""
+    expect(result.status).to eq 0
+    expect(result.stdout).to eq %[four\nmyparam:"cli-value"\nmyp2:"--myp2"\none\n]
+  end
+
+  it "displays tasks and their arguments in the help info" do
+    test_dir "tasks"
+    result = run_rscons(args: %w[-f tasks.rb -h])
+    expect(result.stderr).to eq ""
+    expect(result.status).to eq 0
+    verify_lines(lines(result.stdout), [
+      "Tasks:",
+      /\bthree\b\s+Task three/,
+      /\bfour\b\s+Task four/,
+      /--myparam=MYPARAM\s+My special parameter/,
+      /--myp2\s+My parameter 2/,
+    ])
+    expect(result.stdout).to_not match /^\s*one\b/
+    expect(result.stdout).to_not match /^\s*two\b/
+  end
+
 end