Honor build-tool-depends in CmdRun

Similarly to CmdExec and CmdTest, get paths to all dependency binaries
and add those to PATH. Unlike CmdExec, add just the explicitly required
paths.

cabal-install/src/Distribution/Client/CmdExec.hs

@@ -268,6 +268,7 @@ withTempEnvFile verbosity baseCtx buildCtx buildStatus action = do
         action envOverrides
     )
 
+-- | Get paths to all dependency executables to be included in PATH.
 pathAdditions :: ProjectBaseContext -> ProjectBuildContext -> [FilePath]
 pathAdditions ProjectBaseContext{..} ProjectBuildContext{..} =
   paths ++ cabalConfigPaths
@@ -281,6 +282,7 @@ pathAdditions ProjectBaseContext{..} ProjectBuildContext{..} =
       S.toList $
         binDirectories distDirLayout elaboratedShared elaboratedPlanToExecute
 
+-- | Get paths to all dependency executables to be included in PATH.
 binDirectories
   :: DistDirLayout
   -> ElaboratedSharedConfig

cabal-install/src/Distribution/Client/CmdRun.hs

@@ -60,6 +60,7 @@ import Distribution.Client.ProjectPlanning
   )
 import Distribution.Client.ProjectPlanning.Types
   ( dataDirsEnvironmentForPlan
+  , elabExeDependencyPaths
   )
 import Distribution.Client.ScriptUtils
   ( AcceptNoTargets (..)
@@ -302,11 +303,13 @@ runAction flags@NixStyleFlags{..} targetAndArgs globalFlags =
             || buildSettingOnlyDownload (buildSettings baseCtx)
 
     let extraPath =
-          fromNubList
-            . projectConfigProgPathExtra
-            . projectConfigShared
-            . projectConfig
-            $ baseCtx
+          elabExeDependencyPaths pkg
+            ++ ( fromNubList
+                  . projectConfigProgPathExtra
+                  . projectConfigShared
+                  . projectConfig
+                  $ baseCtx
+               )
 
     logExtraProgramSearchPath verbosity extraPath
 

changelog.d/pr-9341

@@ -0,0 +1,11 @@
+synopsis: Fix run command environment
+packages: cabal-install
+prs: #9341
+issues: #8391
+
+description: {
+
+- The Run command will now add binary paths of dependencies
+  (build-tool-depends) to PATH, just like Exec and Test commands.
+
+}