Index: client/pkgr.eagle
==================================================================
--- client/pkgr.eagle
+++ client/pkgr.eagle
@@ -127,38 +127,33 @@
 
     if {[info exists $varName]} then {
       return [set $varName]
     }
 
-    return ""; # NOTE: System default, which is "public".
-  }
-
-  proc getLookupVersion { requirement } {
-    if {[set index [string first - $requirement]] != -1} then {
-      incr index -1; set requirement [string range $requirement 0 $index]
-    }
-
-    if {[set index [string first a $requirement]] != -1 || \
-        [set index [string first b $requirement]] != -1} then {
-      incr index -1; set requirement [string range $requirement 0 $index]
-    }
-
-    if {$requirement eq "0"} then {
-      set requirement ""
-    } elseif {[regexp -- {^\d+$} $requirement]} then {
-      append requirement .0
-    }
-
-    return $requirement
+    global env
+    set varName [string trim $varName :]
+
+    if {[info exists env($varName)]} then {
+      return $env($varName)
+    }
+
+    return ""; # NOTE: System default, which is "public".
   }
 
   proc getLookupBaseUri {} {
     set varName [appendArgs [getLookupVarNamePrefix] base_uri]
 
     if {[info exists $varName]} then {
       return [set $varName]
     }
+
+    global env
+    set varName [string trim $varName :]
+
+    if {[info exists env($varName)]} then {
+      return $env($varName)
+    }
 
     return https://urn.to/r/pkg; # NOTE: System default.
   }
 
   proc getLookupUri { apiKey package version } {
@@ -184,10 +179,29 @@
       return [appendArgs \
           $baseUri ? [http::formatQuery raw 1 method lookup apiKey $apiKey \
           package $package version $version]]
     }
   }
+
+  proc getLookupVersion { requirement } {
+    if {[set index [string first - $requirement]] != -1} then {
+      incr index -1; set requirement [string range $requirement 0 $index]
+    }
+
+    if {[set index [string first a $requirement]] != -1 || \
+        [set index [string first b $requirement]] != -1} then {
+      incr index -1; set requirement [string range $requirement 0 $index]
+    }
+
+    if {$requirement eq "0"} then {
+      set requirement ""
+    } elseif {[regexp -- {^\d+$} $requirement]} then {
+      append requirement .0
+    }
+
+    return $requirement
+  }
 
   proc getLookupData { apiKey package version } {
     set uri [getLookupUri $apiKey $package $version]
 
     if {[string length $uri] == 0} then {

Index: client/pkgr.eagle.harpy
==================================================================
--- client/pkgr.eagle.harpy
+++ client/pkgr.eagle.harpy
@@ -19,32 +19,32 @@
 <Certificate xmlns="https://eagle.to/2011/harpy"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <Protocol>None</Protocol>
   <Vendor>Mistachkin Systems</Vendor>
-  <Id>31b3debb-6a3f-4ed3-8652-b89e1ea28ce4</Id>
+  <Id>cf83423e-b1fd-4c09-9293-0c0dc51a6359</Id>
   <HashAlgorithm>SHA512</HashAlgorithm>
   <EntityType>Script</EntityType>
-  <TimeStamp>2016-08-16T23:51:08.3669453Z</TimeStamp>
+  <TimeStamp>2016-08-17T00:11:40.8366719Z</TimeStamp>
   <Duration>-1.00:00:00</Duration>
   <Key>0x2c322765603b5278</Key>
   <Signature>
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-    0RwCYr/3LUtUpgObO8sln8U9iSYnlmvaHN1dVaGF7/rffUrbH2Chtcs3C8WmAPwmRQuve1IxNvSE
-    xiVir2Riyn7QhxRoCQylOKHe78aZg0Fc04VPrBts2xGoPcjsktGmZn7AvodP0jhYw/SHJk3eozX2
-    2EyAKLBSMtbEeCfrnvRI/ibNirKQsR8CKPL8/w+/ZDzXQlSxvG/wjUBo3K/0Q2XpPBit9nNF5emz
-    XUilkzOpBXOY9DFMZ2EdQVUe/PD0QFOAlKvNG6QmjcU9Dikh6nt/9VxlTvZVDCz6/jkPZbLuKMLy
-    3AZ/vBUzPtWXMXDvztl3WPP4Iw3dJz3JwjSNkAbtcelPFZfHjwnTd/3m260moo+uQ/PyAhldGmGj
-    rbXmq7ZZzUL7wzVwq2r70YI/umIAIOtWQopdBMiNEsFSHuCddk3lgRjOhEv1KfUoL1r4VzimxGgk
-    5987eH+dF+82yJyXFKNzZHQlwc7+oF3dm9Uq5/pldyfns1vTLkPtLtSE78bekLImeujGhWenq9Vd
-    X9/3APPX0VIUAsXiNCA6MYcIzWck3hJCV5EdSnJI+YYlCCvwahnrO7JNrVoVqAhXvBXUg0fGPt1h
-    bKv0MVNHu8/raHYFfowW8un1iW+7EIsTNc8OoV/OrJmNUtBxpi/L4+rpB7y95HdeUhRdBPdD7o+U
-    +okJ7898aqYNuAh1zaA16ADVsfDPYSPjLVmQ/f1z1SJOc+ZyZbJOCYqxnVi2IFFlZ2tCCqSA2wT1
-    ZWm27GogRffut9WykFIKnDhcPP9zRTS/PcPgPK0Wbgw9gujgSySCRikZtX5ZREO9QnOHJqZbpuSR
-    CsydwuIgxYQzM9aO4vZFLZYh6FruE3zNMBOjBQz6E3x65JWQQeEZGhIwEUcvWppCK/SqJm0FzEKj
-    cmXy/rowXWNSZ6c2YGpYuHDz1j65NGYrXZsZcyW7U5x/r3x28pjlmmmE8AbgyXtQzUtxgAsyhucP
-    xBhQI8P18ItElflgk4tjtorv5R5UnuAHZkR5owYcHOntGfroFQFeA1HY9wEG8mS1Ou0bgvg/3xJD
-    0fCLduoDZ/JACK6OiEiUZxMcNqNBnWbjlHYGqn4mFOB0/WGmmfJNQ8EVCXdS8oVWUPddQWBu8vv/
-    N2K5YwcJfyzB19M6dlsiSjzy7xquhMRJm+fEW1R+g3A5xrdGrRZyHSjzHgghxCAxy8qlbDjzsyKX
-    MdZznmYsHVuHoc2K1rICDfNwFlVU/5LWWJVcVMtBwKqqUP3bSrAGAuhXr0c0+gquqXha3F/k6Q==
+    ncLICbPtsAsJYRGwrbHRkj1xa3S28XbY36xAWx33JDqIJrRstIRDEY33uAikW9T56Vfk2CDClB64
+    9WVrFAzdTbshrxMMhqeUq1M02Oi4gxYLK0OAbW6WYOTP2735X6k0CTf0FiQk/E20GUwtnuQ12P0q
+    BcyW/uBRAS2nDm2Q8ln22UTTgeyYgix8utmrf5hs72UMjjRKOGfPWP5bEHxxnK8HblEWFZWM6Sml
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+    9tkuLPx8pe3CzOyDQArLyIuqeisW4OFJ78TgwiqMWzVI1adNsPrlHziqK7VjtSP61AJyo9hBUPod
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+    WUaenmzqt2iyalOdLzz2AkTwSabZc1UvH4tYh8icoqBuFRA2s877WdqrRuVwV1Gv6rA0v4B2DoGx
+    B4i0YymQHUR6QC2o8cuX6vAcNbaRLwG9ZoIB10SqCvzDUB9cJr+RMhkWhfkd4fso0M7q4IhKQZ1x
+    6ndv5WoXvjvzUxxMjAyhd+rf7Lg4zCyYM3v7n/Jdh1IBnwxWoskiGQkB3cBYVXMaTIXuU9tmisbv
+    V6puuHEv/BFLgRCVUX1q81IehoqNb3DSPCgGYRtunDd04D108W/jHhXJb/Q1sU/Zb1q1FBNv//aa
+    D4OqpUgu8L8e+CiM8XQH0KUyZs7GJRwMGS2idn/ZzAzH0RK+Y2D/H0tvqPp0TWvit4KOkjJ+UP1/
+    5FzVlIIR3lSyORhabu7uLHEwY2GDKrlzOQHFPaZVzjd/FcZpWk4YYSH8oawRMsPjERoqIeRRtMkv
+    E5selq8xFdLObuIEIvFVQQlr4w+UNbS1pI18AfAicNhMFpnJoZDzLRekMyrrItOFqolGWXVS7IkQ
+    GO2W8XCeLEpXaKSjSYou1q9ABnShprmVIEDIvaW7IRMdaV/Vdmy/Kt1UyOuDixZoKQvBpZ3k7gmj
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+    xdAq9jBDbhz0UNWtm7s5op9UryqJfJ+N/j8mnHOZbKKw69nRTNnZLJNbdkRWtEmk1TCsw6Vrlg==
   </Signature>
 </Certificate>