diff --git a/Project.toml b/Project.toml
index 2eca3ca..1a91c29 100644
--- a/Project.toml
+++ b/Project.toml
@@ -6,6 +6,7 @@ version = "0.3.3-DEV"
 InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
+peco_jll = "b89f85f3-45f8-5ea8-8223-9dfa39faf294"
 
 [compat]
 julia = "= 0.7, 1.0"
diff --git a/src/InteractiveCodeSearch.jl b/src/InteractiveCodeSearch.jl
index 72fc063..60d3311 100644
--- a/src/InteractiveCodeSearch.jl
+++ b/src/InteractiveCodeSearch.jl
@@ -47,12 +47,6 @@ using Base
 using Base: IOError
 using InteractiveUtils: edit, gen_call_with_extracted_types, methodswith
 
-function _readandwrite(cmds)
-    processes = open(cmds, "r+")
-    return (processes.out, processes.in, processes)
-end
-
-
 abstract type SearchPolicy end
 struct Shallow <: SearchPolicy end
 struct Recursive <: SearchPolicy end
@@ -60,10 +54,27 @@ struct Recursive <: SearchPolicy end
 
 mutable struct SearchConfig  # CONFIG
     open
-    interactive_matcher::Cmd
+    interactive_matcher::Function
     auto_open::Bool
 end
 
+function setmatcher!(cmd::Function, obj::SearchConfig)
+    obj.interactive_matcher = cmd
+    return
+end
+
+function setmatcher!(cmd::Cmd, obj::SearchConfig)
+    setmatcher!(convertCmd(cmd), obj)
+end
+
+function convertCmd(cmd)
+    maybe_warn_matcher(cmd)
+    return function (f)
+        maybe_warn_matcher(cmd)
+        f(cmd)
+    end
+end
+
 maybe_identifier(s) = !startswith(string(s), "#")
 
 is_locatable(::Any) = false
@@ -147,6 +158,12 @@ function find_source_file(file)
     return path
 end
 
+function _readandwrite(matcher)
+    proc = matcher() do cmd
+        open(`$cmd`, "r+")
+    end
+    return (proc.out, proc.in, proc)
+end
 
 """
     read_stdout(input::AbstractString, cmd)
@@ -182,7 +199,6 @@ function parse_loc(line)
 end
 
 function run_matcher(input)
-    maybe_warn_matcher()
     return String(read_stdout(input, CONFIG.interactive_matcher))
 end
 
@@ -265,8 +281,7 @@ InteractiveCodeSearch.CONFIG.auto_open = false  # open matcher even when there
 
 ## Using InteractiveCodeSearch.jl by default
 
-Put the following code in your `~/.julia/config/startup.jl` (≥ Julia 0.7)
-or `~/.juliarc.jl` (Julia 0.6):
+Put the following code in your `~/.julia/config/startup.jl`:
 
 ```julia
 using InteractiveCodeSearch
@@ -275,7 +290,7 @@ using InteractiveCodeSearch
 """
 const CONFIG = SearchConfig(
     edit,                       # open
-    `peco`,                     # interactive_matcher
+    x->error("uninitialized"),  # interactive_matcher
     true,                       # auto_open
 )
 
@@ -437,10 +452,23 @@ macro searchmethods(x)
     end
 end
 
-const preferred_terminal = Cmd[
-    `peco`,
-    `percol`,
-]
+################################################################################
+#                               matcher binaries                               #
+################################################################################
+
+@static if VERSION<v"1.3-"
+    const preferred_terminal = Cmd[
+        `peco`,
+        `percol`,
+    ]
+else
+    using peco_jll
+    const preferred_terminal = Union{Function,Cmd}[
+        `peco`,
+        peco,
+        `percol`,
+    ]
+end
 
 const preferred_gui = Cmd[
     `rofi -dmenu -i -p "🔎"`,
@@ -451,43 +479,18 @@ function need_gui(stdstreams = [stdout, stdin])
     return !all(isa.(stdstreams, Ref(Base.TTY)))
 end
 
-function choose_preferred_command(commands::Vector{Cmd})
+function choose_preferred_command(commands::Vector{<:Union{Function,Cmd}}, default=nothing)
     for cmd in commands
-        if Sys.which(cmd.exec[1]) !== nothing
+        if !(cmd isa Cmd) || Sys.which(cmd.exec[1]) !== nothing
             return cmd
         end
     end
-    return nothing
-end
-
-function choose_preferred_command(f, commands::Vector{Cmd})
-    cmd = choose_preferred_command(commands)
-    if cmd !== nothing
-        return cmd
-    else
-        return f()
-    end
+    return default
 end
 
-# Julia 0.6
-const _preferred_terminal = preferred_terminal
-const _preferred_gui = preferred_gui
-
-function choose_interactive_matcher(;
-        preferred_terminal = _preferred_terminal,
-        preferred_gui = _preferred_gui,
-        gui = need_gui())
-    if gui
-        return choose_preferred_command(preferred_gui) do
-            return preferred_gui[1]
-        end
-    else
-        return choose_preferred_command(preferred_terminal) do
-            return choose_preferred_command(preferred_gui) do
-                return preferred_terminal[1]
-            end
-        end
-    end
+function choose_interactive_matcher()
+    need_gui() && return choose_preferred_command(preferred_gui, preferred_gui[1])
+    return choose_preferred_command(vcat(preferred_terminal, preferred_gui), preferred_terminal[1])
 end
 
 function matcher_installation_tips(program::AbstractString)
@@ -509,7 +512,7 @@ function matcher_installation_tips(program::AbstractString)
     """
 end
 
-function maybe_warn_matcher(cmd = CONFIG.interactive_matcher)
+function maybe_warn_matcher(cmd::Cmd)
     if Sys.which(cmd.exec[1]) === nothing
         @warn """
         Matcher $(cmd.exec[1]) not installed.
@@ -519,8 +522,7 @@ function maybe_warn_matcher(cmd = CONFIG.interactive_matcher)
 end
 
 function __init__()
-    CONFIG.interactive_matcher = choose_interactive_matcher()
-    maybe_warn_matcher()
+    setmatcher!(choose_interactive_matcher(), CONFIG)
 end
 
 include("taskmanager.jl")
diff --git a/test/runtests.jl b/test/runtests.jl
index e30d5a9..2975b7d 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -3,7 +3,7 @@ module TestInteractiveCodeSearch
 include("preamble.jl")
 using InteractiveCodeSearch:
     Shallow, Recursive, list_locatables, module_methods, choose_method,
-    read_stdout, parse_loc, single_macrocall, isliteral
+    read_stdout, parse_loc, single_macrocall, isliteral, convertCmd
 using Base: find_source_file
 
 function with_config(f; kwargs...)
@@ -22,8 +22,8 @@ function with_config(f; kwargs...)
 end
 
 @testset "read_stdout" begin
-    @test strip(String(read_stdout("spam", `cat`))) == "spam"
-    @test strip(String(read_stdout(io -> write(io, "egg"), `cat`))) == "egg"
+    @test strip(String(read_stdout("spam", convertCmd(`cat`)))) == "spam"
+    @test strip(String(read_stdout(io -> write(io, "egg"), convertCmd(`cat`)))) == "egg"
 end
 
 @testset "parse_loc" begin
@@ -70,7 +70,7 @@ end
 
     with_config(
         open = (_...) -> error("must not be called"),
-        interactive_matcher = `echo " at test.jl:249"`,
+        interactive_matcher = convertCmd(`echo " at test.jl:249"`),
         auto_open = true,
     ) do
         # when function has only one method, `auto_open` has to kick-in:
@@ -91,7 +91,7 @@ end
 
     with_config(
         open = (_...) -> error("must not be called"),
-        interactive_matcher = `echo " at test.jl:249"`,
+        interactive_matcher = convertCmd(`echo " at test.jl:249"`),
         auto_open = false,
     ) do
         # When `auto_open = false`, the matcher has to be called
@@ -127,7 +127,7 @@ end
     dummy_openline(args...) = push!(open_args, args)
 
     with_config(
-        interactive_matcher = `echo " at test.jl:249"`,
+        interactive_matcher = convertCmd(`echo " at test.jl:249"`),
         open = dummy_openline,
         auto_open = false,
     ) do
@@ -149,7 +149,7 @@ end
     end
 
     with_config(
-        interactive_matcher = `true`,
+        interactive_matcher = convertCmd(`true`),
         open = (args...) -> error("open must not be called"),
         auto_open = false,
     ) do